1、原生JavaScript实现字符串长度截取
1 function cutstr(str, len) {
2 var temp;
3 var icount = 0;
4 var patrn = /[^\x00-\xff]/;
5 var strre = "";
6 for (var i = 0; i < str.length; i++) {
7 if (icount < len - 1) {
8 temp = str.substr(i, 1);
9 if (patrn.exec(temp) == null) {
10 icount = icount + 1
11 } else {
12 icount = icount + 2
13 }
14 strre += temp
15 } else {
16 break
17 }
18 }
19 return strre + "..."
20 }
2、原生JavaScript获取域名主机
1 function getHost(url) {
2 var host = "null";
3 if(typeof url == "undefined"|| null == url) {
4 url = window.location.href;
5 }
6 var regex = /^\w+\:\/\/([^\/]*).*/;
7 var match = url.match(regex);
8 if(typeof match != "undefined" && null != match) {
9 host = match[1];
10 }
11 return host;
12 }
3、原生JavaScript清除空格
1 String.prototype.trim = function() {
2 var reExtraSpace = /^\s*(.*?)\s+$/;
3 return this.replace(reExtraSpace, "$1")
4 }
4、原生JavaScript替换全部
1 String.prototype.replaceAll = function(s1, s2) {
2 return this.replace(new RegExp(s1, "gm"), s2)
3 }
5、原生JavaScript转义html标签
1 function HtmlEncode(text) {
2 return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>')
3 }
6、原生JavaScript还原html标签
1 function HtmlDecode(text) {
2 return text.replace(/&/g, '&').replace(/"/g, '\"').replace(/</g, '<').replace(/>/g, '>')
3 }
7、原生JavaScript时间日期格式转换
1 Date.prototype.Format = function(formatStr) {
2 var str = formatStr;
3 var Week = ['日', '一', '二', '三', '四', '五', '六'];
4 str = str.replace(/yyyy|YYYY/, this.getFullYear());
5 str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));
6 str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));
7 str = str.replace(/M/g, (this.getMonth() + 1));
8 str = str.replace(/w|W/g, Week[this.getDay()]);
9 str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());
10 str = str.replace(/d|D/g, this.getDate());
11 str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());
12 str = str.replace(/h|H/g, this.getHours());
13 str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
14 str = str.replace(/m/g, this.getMinutes());
15 str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());
16 str = str.replace(/s|S/g, this.getSeconds());
17 return str
18 }
8、原生JavaScript判断是否为数字类型
1 function isDigit(value) {
2 var patrn = /^[0-9]*$/;
3 if (patrn.exec(value) == null || value == "") {
4 return false
5 } else {
6 return true
7 }
8 }
9、原生JavaScript设置cookie值
1 function setCookie(name, value, Hours) {
2 var d = new Date();
3 var offset = 8;
4 var utc = d.getTime() + (d.getTimezoneOffset() * 60000);
5 var nd = utc + (3600000 * offset);
6 var exp = new Date(nd);
7 exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);
8 document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"
9 }
10、原生JavaScript获取cookie值
1 function getCookie(name) {
2 var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
3 if (arr != null) return unescape(arr[2]);
4 return null
5 }
11、原生JavaScript加入收藏夹
1 function AddFavorite(sURL, sTitle) {
2 try {
3 window.external.addFavorite(sURL, sTitle)
4 } catch(e) {
5 try {
6 window.sidebar.addPanel(sTitle, sURL, "")
7 } catch(e) {
8 alert("加入收藏失败，请使用Ctrl+D进行添加")
9 }
10 }
11 }
12、原生JavaScript设为首页
1 function setHomepage() {
2 if (document.all) {
3 document.body.style.behavior = 'url(#default#homepage)';
4 document.body.setHomePage('http://www.jqueryschool') //http:jq-school.com/
5 } else if (window.sidebar) {
6 if (window.netscape) {
7 try {
8 netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect")
9 } catch(e) {
10 alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true")
11 }
12 }
13 var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
14 prefs.setCharPref('browser.startup.homepage', 'http://www.jqueryschool') //http:jq-school.com/
15 }
16 }
13、原生JavaScript判断IE6
1 var ua = navigator.userAgent.toLowerCase();
2 var isIE6 = ua.indexOf("msie 6") > -1;
3 if (isIE6) {
4 try {
5 document.execCommand("BackgroundImageCache", false, true)
6 } catch(e) {}
7 }
14、原生JavaScript加载样式文件
1 function LoadStyle(url) {
2 try {
3 document.createStyleSheet(url)
4 } catch(e) {
5 var cssLink = document.createElement('link');
6 cssLink.rel = 'stylesheet';
7 cssLink.type = 'text/css';
8 cssLink.href = url;
9 var head = document.getElementsByTagName('head')[0];
10 head.appendChild(cssLink)
11 }
12 }
15、原生JavaScript返回脚本内容
1 function evalscript(s) {
2 if(s.indexOf('<script') == -1) return s;
3 var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig;
4 var arr = [];
5 while(arr = p.exec(s)) {
6 var p1 = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i;
7 var arr1 = [];
8 arr1 = p1.exec(arr[0]);
9 if(arr1) {
10 appendscript(arr1[1], '', arr1[2], arr1[3]);
11 } else {
12 p1 = /<script(.*?)>([^\x00]+?)<\/script>/i;
13 arr1 = p1.exec(arr[0]);
14 appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1);
15 }
16 }
17 return s;
18 }
16、原生JavaScript清除脚本内容
1 function stripscript(s) {
2 return s.replace(/<script.*?>.*?<\/script>/ig, '');
3 }
17、原生JavaScript动态加载脚本文件
1 function appendscript(src, text, reload, charset) {
2 var id = hash(src + text);
3 if(!reload && in_array(id, evalscripts)) return;
4 if(reload && $(id)) {
5 $(id).parentNode.removeChild($(id));
6 }
7
8 evalscripts.push(id);
9 var scriptNode = document.createElement("script");
10 scriptNode.type = "text/javascript";
11 scriptNode.id = id;
12 scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset);
13 try {
14 if(src) {
15 scriptNode.src = src;
16 scriptNode.onloadDone = false;
17 scriptNode.onload = function () {
18 scriptNode.onloadDone = true;
19 JSLOADED[src] = 1;
20 };
21 scriptNode.onreadystatechange = function () {
22 if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode.onloadDone) {
23 scriptNode.onloadDone = true;
24 JSLOADED[src] = 1;
25 }
26 };
27 } else if(text){
28 scriptNode.text = text;
29 }
30 document.getElementsByTagName('head')[0].appendChild(scriptNode);
31 } catch(e) {}
32 }
18、原生JavaScript返回按ID检索的元素对象
1 function $(id) {
2 return !id ? null : document.getElementById(id);
3 }
19、原生JavaScript返回浏览器版本内容
1 function browserVersion(types) {
2 var other = 1;
3 for(i in types) {
4 var v = types[i] ? types[i] : i;
5 if(USERAGENT.indexOf(v) != -1) {
6 var re = new RegExp(v + '(\\/|\\s)([\\d\\.]+)', 'ig');
7 var matches = re.exec(USERAGENT);
8 var ver = matches != null ? matches[2] : 0;
9 other = ver !== 0 && v != 'mozilla' ? 0 : other;
10 }else {
11 var ver = 0;
12 }
13 eval('BROWSER.' + i + '= ver');
14 }
15 BROWSER.other = other;
16 }
20、原生JavaScript元素显示的通用方法
1 function $(id) {
2 return !id ? null : document.getElementById(id);
3 }
4 function display(id) {
5 var obj = $(id);
6 if(obj.style.visibility) {
7 obj.style.visibility = obj.style.visibility == 'visible' ? 'hidden' : 'visible';
8 } else {
9 obj.style.display = obj.style.display == '' ? 'none' : '';
10 }
11 }
21、原生JavaScript中有insertBefore方法,可惜却没有insertAfter方法?用如下函数实现
1 function insertAfter(newChild,refChild){
2 var parElem=refChild.parentNode;
3 if(parElem.lastChild==refChild){
4 refChild.appendChild(newChild);
5 }else{
6 parElem.insertBefore(newChild,refChild.nextSibling);
7 }
8 }
22、原生JavaScript中兼容浏览器绑定元素事件
1 function addEventSamp(obj,evt,fn){
2 if (obj.addEventListener) {
3 obj.addEventListener(evt, fn, false);
4 }else if(obj.attachEvent){
5 obj.attachEvent('on'+evt,fn);
6 }
7 }
23、原生JavaScript光标停在文字的后面，文本框获得焦点时调用
1 function focusLast(){
2 var e = event.srcElement;
3 var r =e.createTextRange();
4 r.moveStart('character',e.value.length);
5 r.collapse(true);
6 r.select();
7 }
24、原生JavaScript检验URL链接是否有效
1 function getUrlState(URL){
2 var xmlhttp = new ActiveXObject("microsoft.xmlhttp");
3 xmlhttp.Open("GET",URL, false);
4 try{
5 xmlhttp.Send();
6 }catch(e){
7 }finally{
8 var result = xmlhttp.responseText;
9 if(result){
10 if(xmlhttp.Status==200){
11 return(true);
12 }else{
13 return(false);
14 }
15 }else{
16 return(false);
17 }
18 }
19 }
25、原生JavaScript格式化CSS样式代码
1 function formatCss(s){//格式化代码
2 s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
3 s = s.replace(/;\s*;/g, ";"); //清除连续分号
4 s = s.replace(/\,[\s\.\#\d]*{/g, "{");
5 s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2");
6 s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2");
7 s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2");
8 return s;
9 }
26、原生JavaScript压缩CSS样式代码
1 function yasuoCss (s) {//压缩代码
2 s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //删除注释
3 s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
4 s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容错处理
5 s = s.replace(/;\s*;/g, ";"); //清除连续分号
6 s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白
7 return (s == null) ? "" : s[1];
8 }
27、原生JavaScript获取当前路径
1 var currentPageUrl = "";
2 if (typeof this.href === "undefined") {
3 currentPageUrl = document.location.toString().toLowerCase();
4 }
5 else {
6 currentPageUrl = this.href.toString().toLowerCase();
7 }
28、原生JavaScriptIP转成整型
1 function _ip2int(ip){
2 var num = 0;
3 ip = ip.split(".");
4 num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]);
5 num = num >>> 0;
6 return num;
7 }
29、原生JavaScript整型解析为IP地址
1 function _int2iP(num){
2 var str;
3 var tt = new Array();
4 tt[0] = (num >>> 24) >>> 0;
5 tt[1] = ((num << 8) >>> 24) >>> 0;
6 tt[2] = (num << 16) >>> 24;
7 tt[3] = (num << 24) >>> 24;
8 str = String(tt[0]) + "." + String(tt[1]) + "." + String(tt[2]) + "." + String(tt[3]);
9 return str;
10 }
30、原生JavaScript实现checkbox全选与全不选
1 function checkAll() {
2 var selectall = document.getElementById("selectall");
3 var allbox = document.getElementsByName("allbox");
4 if (selectall.checked) {
5 for (var i = 0; i < allbox.length; i++) {
6 allbox[i].checked = true;
7 }
8 } else {
9 for (var i = 0; i < allbox.length; i++) {
10 allbox[i].checked = false;
11 }
12 }
13 }
31、原生JavaScript判断是否移动设备
1 function isMobile(){
2 if (typeof this._isMobile === 'boolean'){
3 return this._isMobile;
4 }
5 var screenWidth = this.getScreenWidth();
6 var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
7 var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");
8 if(!fixViewPortsExperiment){
9 if(!this.isAppleMobileDevice()){
10 screenWidth = screenWidth/window.devicePixelRatio;
11 }
12 }
13 var isMobileScreenSize = screenWidth < 600;
14 var isMobileUserAgent = false;
15 this._isMobile = isMobileScreenSize && this.isTouchScreen();
16 return this._isMobile;
17 }
32、原生JavaScript判断是否移动设备访问
1 function isMobileUserAgent(){
2 return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase()));
3 }
33、原生JavaScript判断是否苹果移动设备访问
1 function isAppleMobileDevice(){
2 return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
3 }
34、原生JavaScript判断是否安卓移动设备访问
1 function isAndroidMobileDevice(){
2 return (/android/i.test(navigator.userAgent.toLowerCase()));
3 }
35、原生JavaScript判断是否Touch屏幕
1 function isTouchScreen(){
2 return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);
3 }
36、原生JavaScript判断是否在安卓上的谷歌浏览器
1 function isNewChromeOnAndroid(){
2 if(this.isAndroidMobileDevice()){
3 var userAgent = navigator.userAgent.toLowerCase();
4 if((/chrome/i.test(userAgent))){
5 var parts = userAgent.split('chrome/');
6
7 var fullVersionString = parts[1].split(" ")[0];
8 var versionString = fullVersionString.split('.')[0];
9 var version = parseInt(versionString);
10
11 if(version >= 27){
12 return true;
13 }
14 }
15 }
16 return false;
17 }
37、原生JavaScript判断是否打开视窗
1 function isViewportOpen() {
2 return !!document.getElementById('wixMobileViewport');
3 }
38、原生JavaScript获取移动设备初始化大小
1 function getInitZoom(){
2 if(!this._initZoom){
3 var screenWidth = Math.min(screen.height, screen.width);
4 if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
5 screenWidth = screenWidth/window.devicePixelRatio;
6 }
7 this._initZoom = screenWidth /document.body.offsetWidth;
8 }
9 return this._initZoom;
10 }
39、原生JavaScript获取移动设备最大化大小
1 function getZoom(){
2 var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width);
3 if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
4 screenWidth = screenWidth/window.devicePixelRatio;
5 }
6 var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
7 var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new");
8 if(FixViewPortsExperimentRunning){
9 return screenWidth / window.innerWidth;
10 }else{
11 return screenWidth / document.body.offsetWidth;
12 }
13 }
40、原生JavaScript获取移动设备屏幕宽度
1 function getScreenWidth(){
2 var smallerSide = Math.min(screen.width, screen.height);
3 var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
4 var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");
5 if(fixViewPortsExperiment){
6 if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
7 smallerSide = smallerSide/window.devicePixelRatio;
8 }
9 }
10 return smallerSide;
11 }
41、原生JavaScript完美判断是否为网址
1 function IsURL(strUrl) {
2 var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(\.[-a-z0-9]+)*\.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i
3 if (regular.test(strUrl)) {
4 return true;
5 }
6 else {
7 return false;
8 }
9 }
42、原生JavaScript根据样式名称检索元素对象
1 function getElementsByClassName(name) {
2 var tags = document.getElementsByTagName('*') || document.all;
3 var els = [];
4 for (var i = 0; i < tags.length; i++) {
5 if (tags[i].className) {
6 var cs = tags[i].className.split(' ');
7 for (var j = 0; j < cs.length; j++) {
8 if (name == cs[j]) {
9 els.push(tags[i]);
10 break
11 }
12 }
13 }
14 }
15 return els
16 }
43、原生JavaScript判断是否以某个字符串开头
1 String.prototype.startWith = function (s) {
2 return this.indexOf(s) == 0
3 }
44、原生JavaScript判断是否以某个字符串结束
1 String.prototype.endWith = function (s) {
2 var d = this.length - s.length;
3 return (d >= 0 && this.lastIndexOf(s) == d)
4 }
45、原生JavaScript返回IE浏览器的版本号
1 function getIE(){
2 if (window.ActiveXObject){
3 var v = navigator.userAgent.match(/MSIE ([^;]+)/)[1];
4 return parseFloat(v.substring(0, v.indexOf(".")))
5 }
6 return false
7 }
46、原生JavaScript获取页面高度
1 function getPageHeight(){
2 var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat"
3 ? a
4 : g.documentElement;
5 return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight);
6 }
47、原生JavaScript获取页面scrollLeft
1 function getPageScrollLeft(){
2 var a = document;
3 return a.documentElement.scrollLeft || a.body.scrollLeft;
4 }
48、原生JavaScript获取页面可视宽度
1 function getPageViewWidth(){
2 var d = document, a = d.compatMode == "BackCompat"
3 ? d.body
4 : d.documentElement;
5 return a.clientWidth;
6 }
49、原生JavaScript获取页面宽度
1 function getPageWidth(){
2 var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat"
3 ? a
4 : g.documentElement;
5 return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth);
6 }
50、原生JavaScript获取页面scrollTop
1 function getPageScrollTop(){
2 var a = document;
3 return a.documentElement.scrollTop || a.body.scrollTop;
4 }
51、原生JavaScript获取页面可视高度
1 function getPageViewHeight() {
2 var d = document, a = d.compatMode == "BackCompat"
3 ? d.body
4 : d.documentElement;
5 return a.clientHeight;
6 }
52、原生JavaScript跨浏览器添加事件
1 function addEvt(oTarget,sEvtType,fnHandle){
2 if(!oTarget){return;}
3 if(oTarget.addEventListener){
4 oTarget.addEventListener(sEvtType,fnHandle,false);
5 }else if(oTarget.attachEvent){
6 oTarget.attachEvent("on" + sEvtType,fnHandle);
7 }else{
8 oTarget["on" + sEvtType] = fnHandle;
9 }
10 }
53、原生JavaScript跨浏览器删除事件
1 function delEvt(oTarget,sEvtType,fnHandle){
2 if(!oTarget){return;}
3 if(oTarget.addEventListener){
4 oTarget.addEventListener(sEvtType,fnHandle,false);
5 }else if(oTarget.attachEvent){
6 oTarget.attachEvent("on" + sEvtType,fnHandle);
7 }else{
8 oTarget["on" + sEvtType] = fnHandle;
9 }
10 }
54、原生JavaScript去掉url前缀
1 function removeUrlPrefix(a){
2 a=a.replace(/：/g,":").replace(/．/g,".").replace(/／/g,"/");
3 while(trim(a).toLowerCase().indexOf("http://")==0){
4 a=trim(a.replace(/http:\/\//i,""));
5 }
6 return a;
7 }
55、原生JavaScript随机数时间戳
1 function uniqueId(){
2 var a=Math.random,b=parseInt;
3 return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());
4 }
56、原生JavaScript全角半角转换,iCase: 0全到半，1半到全，其他不转化
1 function chgCase(sStr,iCase){
2 if(typeof sStr != "string" || sStr.length <= 0 || !(iCase === 0 || iCase == 1)){
3 return sStr;
4 }
5 var i,oRs=[],iCode;
6 if(iCase){/*半->全*/
7 for(i=0; i<sStr.length;i+=1){
8 iCode = sStr.charCodeAt(i);
9 if(iCode == 32){
10 iCode = 12288;
11 }else if(iCode < 127){
12 iCode += 65248;
13 }
14 oRs.push(String.fromCharCode(iCode));
15 }
16 }else{/*全->半*/
17 for(i=0; i<sStr.length;i+=1){
18 iCode = sStr.charCodeAt(i);
19 if(iCode == 12288){
20 iCode = 32;
21 }else if(iCode > 65280 && iCode < 65375){
22 iCode -= 65248;
23 }
24 oRs.push(String.fromCharCode(iCode));
25 }
26 }
27 return oRs.join("");
28 }
57、原生JavaScript确认是否键盘有效输入值
1 function checkKey(iKey){
2 if(iKey == 32 || iKey == 229){return true;}/*空格和异常*/
3 if(iKey>47 && iKey < 58){return true;}/*数字*/
4 if(iKey>64 && iKey < 91){return true;}/*字母*/
5 if(iKey>95 && iKey < 108){return true;}/*数字键盘1*/
6 if(iKey>108 && iKey < 112){return true;}/*数字键盘2*/
7 if(iKey>185 && iKey < 193){return true;}/*符号1*/
8 if(iKey>218 && iKey < 223){return true;}/*符号2*/
9 return false;
10 }
58、原生JavaScript获取网页被卷去的位置
1 function getScrollXY() {
2 return document.body.scrollTop ? {
3 x: document.body.scrollLeft,
4 y: document.body.scrollTop
5 }: {
6 x: document.documentElement.scrollLeft,
7 y: document.documentElement.scrollTop
8 }
9 }
59、原生JavaScript另一种正则日期格式化函数+调用方法
1 Date.prototype.format = function(format){ //author: meizz
2 var o = {
3 "M+" : this.getMonth()+1, //month
4 "d+" : this.getDate(), //day
5 "h+" : this.getHours(), //hour
6 "m+" : this.getMinutes(), //minute
7 "s+" : this.getSeconds(), //second
8 "q+" : Math.floor((this.getMonth()+3)/3), //quarter
9 "S" : this.getMilliseconds() //millisecond
10 }
11 if(/(y+)/.test(format)) format=format.replace(RegExp.$1,
12 (this.getFullYear()+"").substr(4 - RegExp.$1.length));
13 for(var k in o)if(new RegExp("("+ k +")").test(format))
14 format = format.replace(RegExp.$1,
15 RegExp.$1.length==1 ? o[k] :
16 ("00"+ o[k]).substr((""+ o[k]).length));
17 return format;
18 }
19 alert(new Date().format("yyyy-MM-dd hh:mm:ss"));
60、原生JavaScript时间个性化输出功能
1 /*
2 1、< 60s, 显示为“刚刚”
3 2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”
4 3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”
5 4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”
6 5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”
7 */
8 function timeFormat(time){
9 var date = new Date(time)
10 , curDate = new Date()
11 , year = date.getFullYear()
12 , month = date.getMonth() + 1
13 , day = date.getDate()
14 , hour = date.getHours()
15 , minute = date.getMinutes()
16 , curYear = curDate.getFullYear()
17 , curHour = curDate.getHours()
18 , timeStr;
19
20 if(year < curYear){
21 timeStr = year +'年'+ month +'月'+ day +'日 '+ hour +':'+ minute;
22 }else{
23 var pastTime = curDate - date
24 , pastH = pastTime/3600000;
25
26 if(pastH > curHour){
27 timeStr = month +'月'+ day +'日 '+ hour +':'+ minute;
28 }else if(pastH >= 1){
29 timeStr = '今天 ' + hour +':'+ minute +'分';
30 }else{
31 var pastM = curDate.getMinutes() - minute;
32 if(pastM > 1){
33 timeStr = pastM +'分钟前';
34 }else{
35 timeStr = '刚刚';
36 }
37 }
38 }
39 return timeStr;
40 }
61、原生JavaScript解决offsetX兼容性问题
1 // 针对火狐不支持offsetX/Y
2 function getOffset(e){
3 var target = e.target, // 当前触发的目标对象
4 eventCoord,
5 pageCoord,
6 offsetCoord;
7
8 // 计算当前触发元素到文档的距离
9 pageCoord = getPageCoord(target);
10
11 // 计算光标到文档的距离
12 eventCoord = {
13 X : window.pageXOffset + e.clientX,
14 Y : window.pageYOffset + e.clientY
15 };
16
17 // 相减获取光标到第一个定位的父元素的坐标
18 offsetCoord = {
19 X : eventCoord.X - pageCoord.X,
20 Y : eventCoord.Y - pageCoord.Y
21 };
22 return offsetCoord;
23 }
24
25 function getPageCoord(element){
26 var coord = { X : 0, Y : 0 };
27 // 计算从当前触发元素到根节点为止，
28 // 各级 offsetParent 元素的 offsetLeft 或 offsetTop 值之和
29 while (element){
30 coord.X += element.offsetLeft;
31 coord.Y += element.offsetTop;
32 element = element.offsetParent;
33 }
34 return coord;
35 }
62、原生JavaScript常用的正则表达式
1 //正整数
2 /^[0-9]*[1-9][0-9]*$/;
3 //负整数
4 /^-[0-9]*[1-9][0-9]*$/;
5 //正浮点数
6 /^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;
7 //负浮点数
8 /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;
9 //浮点数
10 /^(-?\d+)(\.\d+)?$/;
11 //email地址
12 /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
13 //url地址
14 /^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;
15 //年/月/日（年-月-日、年.月.日）
16 /^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/;
17 //匹配中文字符
18 /[\u4e00-\u9fa5]/;
19 //匹配帐号是否合法(字母开头，允许5-10字节，允许字母数字下划线)
20 /^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;
21 //匹配空白行的正则表达式
22 /\n\s*\r/;
23 //匹配中国邮政编码
24 /[1-9]\d{5}(?!\d)/;
25 //匹配身份证
26 /\d{15}|\d{18}/;
27 //匹配国内电话号码
28 /(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/;
29 //匹配IP地址
30 /((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/;
31 //匹配首尾空白字符的正则表达式
32 /^\s*|\s*$/;
33 //匹配HTML标记的正则表达式
34 < (\S*?)[^>]*>.*?|< .*? />;
63、原生JavaScript实现返回顶部的通用方法
1 function backTop(btnId) {
2 var btn = document.getElementById(btnId);
3 var d = document.documentElement;
4 var b = document.body;
5 window.onscroll = set;
6 btn.style.display = "none";
7 btn.onclick = function() {
8 btn.style.display = "none";
9 window.onscroll = null;
10 this.timer = setInterval(function() {
11 d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
12 b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
13 if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set);
14 },
15 10);
16 };
17 function set() {
18 btn.style.display = (d.scrollTop + b.scrollTop > 100) ? 'block': "none"
19 }
20 };
21 backTop('goTop');
64、原生JavaScript获得URL中GET参数值
1 // 用法：如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得：GET["t1"], GET["t2"], GET["t3"]
2 function get_get(){
3 querystr = window.location.href.split("?")
4 if(querystr[1]){
5 GETs = querystr[1].split("&")
6 GET =new Array()
7 for(i=0;i<GETs.length;i++){
8 tmp_arr = GETs[i].split("=")
9 key=tmp_arr[0]
10 GET[key] = tmp_arr[1]
11 }
12 }
13 return querystr[1];
14 }
65、原生JavaScript实现全选通用方法
1 function checkall(form, prefix, checkall) {
2 var checkall = checkall ? checkall : 'chkall';
3 for(var i = 0; i < form.elements.length; i++) {
4 var e = form.elements[i];
5 if(e.type=="checkbox"){
6 e.checked = form.elements[checkall].checked;
7 }
8 }
9 }
66、原生JavaScript实现全部取消选择通用方法
1 function uncheckAll(form) {
2 for (var i=0;i<form.elements.length;i++){
3 var e = form.elements[i];
4 if (e.name != 'chkall')
5 e.checked=!e.checked;
6 }
7 }
67、原生JavaScript实现打开一个窗体通用方法
1 function openWindow(url,windowName,width,height){
2 var x = parseInt(screen.width / 2.0) - (width / 2.0);
3 var y = parseInt(screen.height / 2.0) - (height / 2.0);
4 var isMSIE= (navigator.appName == "Microsoft Internet Explorer");
5 if (isMSIE) {
6 var p = "resizable=1,location=no,scrollbars=no,width=";
7 p = p+width;
8 p = p+",height=";
9 p = p+height;
10 p = p+",left=";
11 p = p+x;
12 p = p+",top=";
13 p = p+y;
14 retval = window.open(url, windowName, p);
15 } else {
16 var win = window.open(url, "ZyiisPopup", "top=" + y + ",left=" + x + ",scrollbars=" + scrollbars + ",dialog=yes,modal=yes,width=" + width + ",height=" + height + ",resizable=no" );
17 eval("try { win.resizeTo(width, height); } catch(e) { }");
18 win.focus();
19 }
20 }
68、原生JavaScript判断是否为客户端设备
1 function client(o){
2 var b = navigator.userAgent.toLowerCase();
3 var t = false;
4 if (o == 'isOP'){
5 t = b.indexOf('opera') > -1;
6 }
7 if (o == 'isIE'){
8 t = b.indexOf('msie') > -1;
9 }
10 if (o == 'isFF'){
11 t = b.indexOf('firefox') > -1;
12 }
13 return t;
14 }
69、原生JavaScript获取单选按钮的值
1 function get_radio_value(field){
2 if(field&&field.length){
3 for(var i=0;i<field.length;i++){
4 if(field[i].checked){
5 return field[i].value;
6 }
7 }
8 }else {
9 return ;
10 }
11 }
70、原生JavaScript获取复选框的值
1 function get_checkbox_value(field){
2 if(field&&field.length){
3 for(var i=0;i<field.length;i++){
4 if(field[i].checked && !field[i].disabled){
5 return field[i].value;
6 }
7 }
8 }else {
9 return;
10 }
11 }
71、原生JavaScript判断是否为邮箱
1 function isEmail(str){
2 var re=/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
3 if (re.test(str) != true) {
4 return false;
5 }else{
6 return true;
7 }
8 }
72、原生JavaScript判断是否有列表中的危险字符
1 function isValidReg(chars){
2 var re=/<|>|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|\*|@|#|\^|\\/;
3 if (re.test( chars) == true) {
4 return false;
5 }else{
6 return true;
7 }
8 }
73、原生JavaScript判断字符串是否大于规定的长度
1 function isValidLength(chars, len) {
2 if (chars.length < len) {
3 return false;
4 }
5 return true;
6 }
74、原生JavaScript判断字符串是为网址不区分大小写
1 function isValidURL( chars ) {
2 var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/;
3 if (!isNULL(chars)) {
4 chars = jsTrim(chars);
5 if (chars.match(re) == null)
6 return false;
7 else
8 return true;
9 }
10 return false;
11 }
75、原生JavaScript判断字符串是否为小数
1 function isValidDecimal( chars ) {
2 var re=/^\d*\.?\d{1,2}$/;
3 if (chars.match(re) == null)
4 return false;
5 else
6 return true;
7 }
76、原生JavaScript判断字符串是否为整数
1 function isNumber( chars ) {
2 var re=/^\d*$/;
3 if (chars.match(re) == null)
4 return false;
5 else
6 return true;
7 }
77、原生JavaScript判断字符串是否为浮点数
1 function isFloat( str ) {
2 for(i=0;i<str.length;i++) {
3 if ((str.charAt(i)<"0" || str.charAt(i)>"9")&& str.charAt(i) != '.'){
4 return false;
5 }
6 }
7 return true;
8 }
78、原生JavaScript判断字符是否为A-Za-z英文字母
1 function isLetters( str ){
2 var re=/^[A-Za-z]+$/;
3 if (str.match(re) == null)
4 return false;
5 else
6 return true;
7 }
79、原生JavaScript判断字符串是否邮政编码
1 function isValidPost( chars ) {
2 var re=/^\d{6}$/;
3 if (chars.match(re) == null)
4 return false;
5 else
6 return true;
7 }
80、原生JavaScript判断字符是否空NULL
1 function isNULL( chars ) {
2 if (chars == null)
3 return true;
4 if (jsTrim(chars).length==0)
5 return true;
6 return false;
7 }
81、原生JavaScript用正则表达式提取页面代码中所有网址
1 var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/igm,"");
2 alert(aa)
82、原生JavaScript用正则表达式清除相同的数组(低效率)
1 Array.prototype.unique=function(){
2 return this.reverse().join(",").match(/([^,]+)(?!.*\1)/ig).reverse();
3 }
83、原生JavaScript用正则表达式清除相同的数组(高效率)
1 String.prototype.unique=function(){
2 var x=this.split(/[\r\n]+/);
3 var y='';
4 for(var i=0;i<x.length;i++){
5 if(!new RegExp("^"+x[i].replace(/([^\w])/ig,"\\$1")+"$","igm").test(y)){
6 y+=x[i]+"\r\n"
7 }
8 }
9 return y
10 }
84、原生JavaScript用正则表达式按字母排序，对每行进行数组排序
1 function SetSort(){
2 var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//顺序
3 var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序
4 K1.value=K1.value!=text?text:test;
5 }
85、原生JavaScript字符串反序
1 function IsReverse(text){
2 return text.split('').reverse().join('');
3 }
86、原生JavaScript用正则表达式清除html代码中的脚本
1 function clear_script(){
2 K1.value=K1.value.replace(/<script.*?>[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?"[\s\S]*?"|\s+on[a-zA-Z]{3,16}\s?=\s?'[\s\S]*?'|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,"");
3 }
87、原生JavaScript动态执行JavaScript脚本
1 function javascript(){
2 try{
3 eval(K1.value);
4 }catch(e){
5 alert(e.message);
6 }
7 }
88、原生JavaScript动态执行VBScript脚本
1 function vbscript(){
2 try{
3 var script=document.getElementById("K1").value;
4 if(script.trim()=="")return;
5 window.execScript('On Error Resume Next \n'+script+'\n If Err.Number<>0 Then \n MsgBox "请输入正确的VBScript脚本!",48,"脚本错误!" \n End If',"vbscript")
6 }catch(e){
7 alert(e.message);
8 }
9 }
89、原生JavaScript实现金额大写转换函数
1 function transform(tranvalue) {
2 try {
3 var i = 1;
4 var dw2 = new Array("", "万", "亿"); //大单位
5 var dw1 = new Array("拾", "佰", "仟"); //小单位
6 var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用
7 //以下是小写转换成大写显示在合计大写的文本框中
8 //分离整数与小数
9 var source = splits(tranvalue);
10 var num = source[0];
11 var dig = source[1];
12 //转换整数部分
13 var k1 = 0; //计小单位
14 var k2 = 0; //计大单位
15 var sum = 0;
16 var str = "";
17 var len = source[0].length; //整数的长度
18 for (i = 1; i <= len; i++) {
19 var n = source[0].charAt(len - i); //取得某个位数上的数字
20 var bn = 0;
21 if (len - i - 1 >= 0) {
22 bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字
23 }
24 sum = sum + Number(n);
25 if (sum != 0) {
26 str = dw[Number(n)].concat(str); //取得该数字对应的大写数字，并插入到str字符串的前面
27 if (n == '0') sum = 0;
28 }
29 if (len - i - 1 >= 0) { //在数字范围内
30 if (k1 != 3) { //加小单位
31 if (bn != 0) {
32 str = dw1[k1].concat(str);
33 }
34 k1++;
35 } else { //不加小单位，加大单位
36 k1 = 0;
37 var temp = str.charAt(0);
38 if (temp == "万" || temp == "亿") //若大单位前没有数字则舍去大单位
39 str = str.substr(1, str.length - 1);
40 str = dw2[k2].concat(str);
41 sum = 0;
42 }
43 }
44 if (k1 == 3) //小单位到千则大单位进一
45 {
46 k2++;
47 }
48 }
49 //转换小数部分
50 var strdig = "";
51 if (dig != "") {
52 var n = dig.charAt(0);
53 if (n != 0) {
54 strdig += dw[Number(n)] + "角"; //加数字
55 }
56 var n = dig.charAt(1);
57 if (n != 0) {
58 strdig += dw[Number(n)] + "分"; //加数字
59 }
60 }
61 str += "元" + strdig;
62 } catch(e) {
63 return "0元";
64 }
65 return str;
66 }
67 //拆分整数与小数
68 function splits(tranvalue) {
69 var value = new Array('', '');
70 temp = tranvalue.split(".");
71 for (var i = 0; i < temp.length; i++) {
72 value[i] = temp[i];
73 }
74 return value;
75 }
90、原生JavaScript常用的正则表达式大收集
1 匹配中文字符的正则表达式： [\u4e00-\u9fa5]
2 匹配双字节字符（包括汉字在内）：[^\x00-\xff]
3 匹配空行的正则表达式：\n[\s| ]*\r
4 匹配 HTML 标记的正则表达式：<(.*)>.*<\/\1>|<(.*) \/>
5 匹配首尾空格的正则表达式：(^\s*)|(\s*$)
6 匹配 IP 地址的正则表达式：/(\d+)\.(\d+)\.(\d+)\.(\d+)/g
7 匹配 Email 地址的正则表达式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
8 匹配网址 URL 的正则表达式：http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
9 sql 语句：^(select|drop|delete|create|update|insert).*$
10 非负整数：^\d+$
11 正整数：^[0-9]*[1-9][0-9]*$
12 非正整数：^((-\d+)|(0+))$
13 负整数：^-[0-9]*[1-9][0-9]*$
14 整数：^-?\d+$
15 非负浮点数：^\d+(\.\d+)?$
16 正浮点数：^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$
17 非正浮点数：^((-\d+\.\d+)?)|(0+(\.0+)?))$
18 英文字符串：^[A-Za-z]+$
19 英文大写串：^[A-Z]+$
20 英文小写串：^[a-z]+$
21 英文字符数字串：^[A-Za-z0-9]+$
22 英数字加下划线串：^\w+$
23 E-mail地址：^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$
24 URL：^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$
25 邮政编码：^[1-9]\d{5}$
26 电话号码：^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$
27 手机号码：^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}$
28 双字节字符（包括汉字在内）：^\x00-\xff
29 匹配首尾空格：(^\s*)|(\s*$)
30 匹配 HTML 标记：<(.*)>.*<\/\1>|<(.*) \/>
31 匹配空行：\n[\s| ]*\r
32 提取信息中的网络链接：(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
33 提取信息中的邮件地址：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
34 提取信息中的图片链接：(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
35 提取信息中的 IP 地址：(\d+)\.(\d+)\.(\d+)\.(\d+)
36 提取信息中的中国手机号码：(86)*0*13\d{9}
37 提取信息中的中国固定电话号码：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8}
38 提取信息中的中国电话号码（包括移动和固定电话）：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14}
39 提取信息中的中国邮政编码：[1-9]{1}(\d+){5}
40 提取信息中的浮点数（即小数）：(-?\d*)\.?\d+
41 提取信息中的任何数字 ：(-?\d*)(\.\d+)?
42 IP：(\d+)\.(\d+)\.(\d+)\.(\d+)
43 电话区号：^0\d{2,3}$
44 腾讯 QQ 号：^[1-9]*[1-9][0-9]*$
45 帐号（字母开头，允许 5-16 字节，允许字母数字下划线）：^[a-zA-Z][a-zA-Z0-9_]{4,15}$
46 中文、英文、数字及下划线：^[\u4e00-\u9fa5_a-zA-Z0-9]+$
91、原生JavaScript实现窗体改变事件resize的操作（兼容所以的浏览器）
1 (function(){
2 var fn = function(){
3 var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth
4 ,r = 1255
5 ,b = Element.extend(document.body)
6 ,classname = b.className;
7 if(w < r){
8 //当窗体的宽度小于1255的时候执行相应的操作
9 }else{
10 //当窗体的宽度大于1255的时候执行相应的操作
11 }
12 }
13 if(window.addEventListener){
14 window.addEventListener('resize', function(){ fn(); });
15 }else if(window.attachEvent){
16 window.attachEvent('onresize', function(){ fn(); });
17 }
18 fn();
19 })();
92、原生JavaScript用正则清除空格分左右
1 function ltrim(s){ return s.replace( /^(\s*| *)/, ""); }
2 function rtrim(s){ return s.replace( /(\s*| *)$/, ""); }
3 function trim(s){ return ltrim(rtrim(s));}
93、原生JavaScript判断变量是否空值
1 /**
2 * 判断变量是否空值
3 * undefined, null, '', false, 0, [], {} 均返回true，否则返回false
4 */
5 function empty(v){
6 switch (typeof v){
7 case 'undefined' : return true;
8 case 'string' : if(trim(v).length == 0) return true; break;
9 case 'boolean' : if(!v) return true; break;
10 case 'number' : if(0 === v) return true; break;
11 case 'object' :
12 if(null === v) return true;
13 if(undefined !== v.length && v.length==0) return true;
14 for(var k in v){return false;} return true;
15 break;
16 }
17 return false;
18 }
94、原生JavaScript实现base64解码
1 function base64_decode(data){
2 var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
3 var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = [];
4 if (!data) { return data; }
5 data += '';
6 do {
7 h1 = b64.indexOf(data.charAt(i++));
8 h2 = b64.indexOf(data.charAt(i++));
9 h3 = b64.indexOf(data.charAt(i++));
10 h4 = b64.indexOf(data.charAt(i++));
11 bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
12 o1 = bits >> 16 & 0xff;
13 o2 = bits >> 8 & 0xff;
14 o3 = bits & 0xff;
15 if (h3 == 64) {
16 tmp_arr[ac++] = String.fromCharCode(o1);
17 } else if (h4 == 64) {
18 tmp_arr[ac++] = String.fromCharCode(o1, o2);
19 } else {
20 tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
21 }
22 } while (i < data.length);
23 dec = tmp_arr.join('');
24 dec = utf8_decode(dec);
25 return dec;
26 }
95、原生JavaScript实现utf8解码
1 function utf8_decode(str_data){
2 var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += '';
3 while (i < str_data.length) {
4 c1 = str_data.charCodeAt(i);
5 if (c1 < 128) {
6 tmp_arr[ac++] = String.fromCharCode(c1);
7 i++;
8 } else if (c1 > 191 && c1 < 224) {
9 c2 = str_data.charCodeAt(i + 1);
10 tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
11 i += 2;
12 } else {
13 c2 = str_data.charCodeAt(i + 1);
14 c3 = str_data.charCodeAt(i + 2);
15 tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
16 i += 3;
17 }
18 }
19 return tmp_arr.join('');
20 }
96、原生JavaScript获取窗体可见范围的宽与高
1 function getViewSize(){
2 var de=document.documentElement;
3 var db=document.body;
4 var viewW=de.clientWidth==0 ? db.clientWidth : de.clientWidth;
5 var viewH=de.clientHeight==0 ? db.clientHeight : de.clientHeight;
6 return Array(viewW ,viewH);
7 }
97、原生JavaScript判断IE版本号（既简洁、又向后兼容！）
1 var _IE = (function(){
2 var v = 3, div = document.createElement('div'), all = div.getElementsByTagName('i');
3 while (
4 div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->',
5 all[0]
6 );
7 return v > 4 ? v : false ;
8 }());
98、原生JavaScript获取浏览器版本号
1 function browserVersion(types) {
2 var other = 1;
3 for (i in types) {
4 var v = types[i] ? types[i] : i;
5 if (USERAGENT.indexOf(v) != -1) {
6 var re = new RegExp(v + '(\\/|\\s|:)([\\d\\.]+)', 'ig');
7 var matches = re.exec(USERAGENT);
8 var ver = matches != null ? matches[2] : 0;
9 other = ver !== 0 && v != 'mozilla' ? 0 : other;
10 } else {
11 var ver = 0;
12 }
13 eval('BROWSER.' + i + '= ver');
14 }
15 BROWSER.other = other;
16 }
99、原生JavaScript半角转换为全角函数
1 function ToDBC(str){
2 var result = '';
3 for(var i=0; i < str.length; i++){
4 code = str.charCodeAt(i);
5 if(code >= 33 && code <= 126){
6 result += String.fromCharCode(str.charCodeAt(i) + 65248);
7 }else if (code == 32){
8 result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);
9 }else{
10 result += str.charAt(i);
11 }
12 }
13 return result;
14 }
100、原生JavaScript全角转换为半角函数
1 function ToCDB(str){
2 var result = '';
3 for(var i=0; i < str.length; i++){
4 code = str.charCodeAt(i);
5 if(code >= 65281 && code <= 65374){
6 result += String.fromCharCode(str.charCodeAt(i) - 65248);
7 }else if (code == 12288){
8 result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);
9 }else{
10 result += str.charAt(i);
11 }
12 }
13 return result;
14 }
