近百个常用js代码汇总
//檢查空串
function isEmpty(str){
if((str == null)||(str.length == 0)) return (true);
else return(false);
}
//檢查是否未數字
function isDigit(theNum){
var theMask = "0123456789";
if (isEmpty(theNum)) return(false);
else if(theMask.indexOf(theNum) == -1) return(false);
return(true);
}
//去掉左空格
function trimLeft(str){
if(str.charAt(0) == " "){
str = str.slice(1);
str = trimLeft(str);
}
return str;
}
//去掉右空格
function trimRight(str){
if(str.charAt( str.length - 1 ) == " "){
str = str.slice(0,str.length - 1);
str = trimRight(str);
}
return str;
}
//去掉左右空格
function trim(str){
return trimLeft(trimRight(str));
}
//檢查是否是int
function isInt(str){
if(str==""){
return (false);
}
else{
for(i=0;i<str.length;i++){
var chr = str.charAt(i);
if(!(chr>='0' && chr<='9')){
return (false);
}
}
}
return (true);
}
//檢查str是小數，它的整數部分不多于i位，小數部分不多于j位
function isDecimalNoMsg(str,i,j){
var dot = str.indexOf(".");
var dot_last = str.lastIndexOf(".");
var str_f = "";
var str_b = "";
if ( dot != -1 ){
str_f = str.substring(0,dot);
} else {
str_f = str;
}
if ( dot_last != -1 ){
str_b = str.substring(dot+1);
} else {
str_b = str;
}
if( isInt( str_f ) == false ){
//alert(strMsg);
return false;
} else if ( isInt( str_b ) == false ){
//alert(strMsg);
return false;
} else if ( dot != dot_last ){
//alert(strMsg);
return false;
} else if(dot==0 || dot_last==0){
//alert(strMsg);
return false;
}
if(str_f.length>i){
//alert(strMsg);
return false;
}
if(dot!=-1 && str_b.length>j){
//alert(strMsg);
return false;
}
return true;
}
//檢查日期格式Format: 99999999)
function judgeDateFormat(dateStr){
var re,r;
re = /\d{8}/;
r = dateStr.match(re);
return(r);
}
//檢查時間格式(Format: 999999)
function judgeTimeFormat(timeStr){
var re,r;
re = /\d{6}/;
r = timeStr.match(re);
return(r);
}
//檢查日期是否合法(Format: YYYYMMDD).
function validateDate(theStr){
if(theStr.length!=8){
return (false);
} else {
if(theStr=="99999999")
return (true);
var y = theStr.substring(0,4);
var m = theStr.substring(4,6);
var d = theStr.substring(6,8);
var maxDays = 31;
if(isInt(m)==false||isInt(d)==false||isInt(y)==false){
return(false);
}
else if (y.length < 4){ return(false);}
else if (!isBetween(m,1,12)){ return(false);}
if(m.length!=2){ return(false);}
else if (m==4||m==6||m==9||m==11)maxDays = 30;
else if (m==2){
if(y%4>0)maxDays = 28;
else if(y%100==0&&y%400>0)maxDays = 28;
else maxDays = 29;
}
if(isBetween(d,1,maxDays)==false){ return(false);}
if(d.length!=2){ return(false);}
return(true);
}
}
//檢查時間是否合法(Format: HHMMSS).
function validateTime(theStr){
if(theStr.length!=6){
return (false);
} else {
if(theStr == "240000"){
return (true);
}
var h = theStr.substring(0,2);
var m = theStr.substring(2,4);
var s = theStr.substring(4,6);
if(isInt(h)==false||isInt(m)==false||isInt(s)==false){
return(false);
}
else if (h.length < 2){ return(false);}
else if (!isBetween(h,0,23)){ return(false);}
else if (!isBetween(m,0,59)){ return(false);}
else if (!isBetween(s,0,59)){ return(false);}
return true;
}
}
//檢查str包含漢字時最大長度不大于maxLen
function ChineseLenLimit( str, maxLen){
var Strs = str;
var strlength=0;
var i;
for ( i=0;i<str.length;i++) {
if(str.charCodeAt(i)>=1000)
strlength += 2;
else
strlength += 1;
}
if ( strlength > maxLen ){
return false;
}
return true;
}
//檢查val在lo與hi之間
function isBetween(val,lo,hi){
if ((val < lo) || (val > hi)){ return(false);}
else { return(true);}
}
// 檢查charC是‘
function chkChar(charC) {
if (charC == null || charC.length == 0) {
return false;
}
if (charC == '0')return true;
if (charC == '1')return true;
if (charC == '2')return true;
if (charC == '3')return true;
if (charC == '4')return true;
if (charC == '5')return true;
if (charC == '6')return true;
if (charC == '7')return true;
if (charC == '8')return true;
if (charC == '9')return true;
return false;
}
// 檢查intI是正整數
function chkInt(intI) {
if (intI == null || intI.length == 0) {
return false;
}
for(var i=0;i<intI.length;i++) {
if (!chkChar(intI.charAt(i))) {
return false;
}
}
if (intI.charAt(0) == '0') {
return false;
}
return true;
}
// 檢查numN是數字
function chkNumber(numN) {
if (numN == null || numN.length == 0) {
return false;
}
for(var i=0;i<numN.length;i++) {
if (!chkChar(numN.charAt(i))) {
return false;
}
}
if (numN.length > 1 && numN.charAt(0) == '0') {
return false;
}
return true;
}
// 檢查錢數小數點后最多2位
function chkAmount(amtA) {
if (amtA == null || amtA.length == 0) {
return false;
}
var amtArray = new Array();
amtArray = amtA.split(".");
if (amtArray.length > 2) {
return false;
}
if (amtArray.length == 1) {
if (!chkNumber(amtArray[0])) {
return false;
}
return true;
}
if (!chkNumber(amtArray[0])) {
return false;
}
if (amtArray[1].length > 2) {
return false;
}
for(var i=0;i<amtArray[1].length;i++) {
if (!chkChar(amtArray[1].charAt(i))) {
return false;
}
}
return true;
}
//檢查身份證
function checkAgentId(agentId){
if (agentId.length==10){
if (((agentId.charAt(0)=="A") && (agentId.charAt(1)=="A"))||((agentId.charAt(0)=="A") && (agentId.charAt(1)=="Z"))){
return true;
}else{
checknum1=((agentId.charAt(0)>="A") && (agentId.charAt(0)<="Z"));
checknum2=((agentId.charAt(1)==1) || (agentId.charAt(1)==2));
if (checknum2 && checknum1){
id1 = agentId.charAt(0);
if (id1 == 'A') {id0=1;}
else if (id1 == 'B') { id0=10 ;}
else if (id1 == 'C') { id0=19 ;}
else if (id1 == 'D') { id0=28 ;}
else if (id1 == 'E') { id0=37 ;}
else if (id1 == 'F') { id0=46 ;}
else if (id1 == 'G') { id0=55 ;}
else if (id1 == 'H') { id0=64 ;}
else if (id1 == 'I') { id0=39 ;}
else if (id1 == 'J') { id0=73 ;}
else if (id1 == 'K') { id0=82 ;}
else if (id1 == 'L') { id0=2 ;}
else if (id1 == 'M') { id0=11 ;}
else if (id1 == 'N') { id0=20 ;}
else if (id1 == 'O') { id0=48 ;}
else if (id1 == 'P') { id0=29 ;}
else if (id1 == 'Q') { id0=38 ;}
else if (id1 == 'R') { id0=47 ;}
else if (id1 == 'S') { id0=56 ;}
else if (id1 == 'T') { id0=65 ;}
else if (id1 == 'U') { id0=74 ;}
else if (id1 == 'V') { id0=83 ;}
else if (id1 == 'W') { id0=21 ;}
else if (id1 == 'X') { id0=3 ;}
else if (id1 == 'Y') { id0=12 ;}
else if (id1 == 'Z') { id0=30 ;}
id2 = id0 + agentId.charAt(1)*8 + agentId.charAt(2)*7 + agentId.charAt(3)*6 + agentId.charAt(4)*5 + agentId.charAt(5)*4 + agentId.charAt(6)*3 + agentId.charAt(7)*2 + agentId.charAt(8)*1 + agentId.charAt(9)*1;
if (id2 % 10 == 0){
return true;
}
}
}
}
return false;
}
//轉換從UTF-8 到Big5 或 GB2312
function Unicode2Str(str){
var re=/&#[\da-fA-F]{1,5};/ig;
var arr=str.match(re);
if(arr==null)return("");
var size=arr.length;
var arr2=new Array(size);
for(var i=0;i<arr.length;i++){
arr2[i]=String.fromCharCode(arr[i].replace(/[&#;]/g,""));
}
for(var i=0;i<arr.length;i++){
str=str.replace(arr[i],arr2[i]);
}
//return(arr.toString().replace(/,/g,""))
return str;
}
//獲得當前客戶端時間 (Format: YYYYMMDD).
function getCurrentDate(){
var dateObj= new Date();
var dateString=dateObj.getFullYear();
if(dateObj.getMonth()<10){
dateString=dateString+'0'+dateObj.getMonth();
}else{
dateString+=dateObj.getMonth();
}
if(dateObj.getDate()<10){
dateString+='0'+dateObj.getDate();
}else{
dateString+=dateObj.getDate();
}
return dateString;
}
//居中顯示彈出窗口
function PopWindowOnCenter(url,title,iwidth,iheight){
var ileft,itop;
ileft = (window.screen.width-iwidth)/2;
itop = (window.screen.height-iheight)/2;
window.open(url,title,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width='+iwidth+',height='+iheight+',left='+ileft+',top='+itop);
}
//移動選中的成員從objFromId的select到objToId的select
function moveTo(objFromId,objToId){
var objFrom = document.getElementById(objFromId);
var objTo = document.getElementById(objToId);
var len = objFrom.length;
for(var i=len-1; i>=0; i--){
if(objFrom.options[i].selected){
var j = 0;
for(j = 0; j < objTo.length; j++){
if(objFrom.options[i].value == objTo.options[j].value){
break;
}
}
if(j == objTo.length){//the selected item is not in objTo.
objFrom.options[i].selected = false;
var option1 = objFrom.options[i];
objTo.options.add(new Option(option1.text, option1.value));
objFrom.options.remove(i);
}
objFrom = document.getElementById(objFromId);
len = objFrom.length;
}
}
}
//移動全部成員從objFromId的select到objToId的select
function moveAllTo(objFromId,objToId){
var objFrom = document.getElementById(objFromId);
var objTo = document.getElementById(objToId);
var len = objFrom.length;
for(var i=len-1; i>=0; i--){
var j = 0;
for(j = 0; j < objTo.length; j++){
if(objFrom.options[i].value == objTo.options[j].value){
break;
}
}
if(j == objTo.length){//the selected item is not in objTo.
var option1 = objFrom.options[i];
objTo.options.add(new Option(option1.text, option1.value));
objFrom.options.remove(i);
}
objFrom = document.getElementById(objFromId);
len = objFrom.length;
}
}
//屏蔽非數字鍵
function checkKey(){
if(event.keyCode<48 || (event.keyCode>57 && event.keyCode<96)
|| event.keyCode>105){
if(event.keyCode != 8){
event.returnValue=false;
}
}
}
//用與樹狀列表的顯示
function showMenu(id,ulId){
var obj = document.getElementById(id);
if(obj.className == ""){
obj.className = "selected";
document.getElementById(ulId).style.display = "block";
}
else{
obj.className = "";
document.getElementById(ulId).style.display = "none";
}
}
//檢查str中是否包含漢字
function CheckChinese( str){
var Strs = str;
var i;
for ( i=0;i<str.length;i++) {
if(str.charCodeAt(i)>=1000){
return true;
}
}
return false;
}
//校验是否全由数字组成
程序代码
function isDigit(s)
{
var patrn=/^[0-9]{1,20}$/;
if (!patrn.exec(s)) return false
return true
}
//校验登录名：只能输入5-20个以字母开头、可带数字、“_”、“.”的字串
程序代码
function isRegisterUserName(s)
{
var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}$/;
if (!patrn.exec(s)) return false
return true
}
//校验用户姓名：只能输入1-30个以字母开头的字串
程序代码
function isTrueName(s)
{
var patrn=/^[a-zA-Z]{1,30}$/;
if (!patrn.exec(s)) return false
return true
}
//校验密码：只能输入6-20个字母、数字、下划线
程序代码
function isPasswd(s)
{
var patrn=/^(w){6,20}$/;
if (!patrn.exec(s)) return false
return true
}
//校验普通电话、传真号码：可以“+”开头，除数字外，可含有“-”
程序代码
function isTel(s)
{
//var patrn=/^[+]{0,1}(d){1,3}[ ]?([-]?(d){1,12})+$/;
var patrn=/^[+]{0,1}(d){1,3}[ ]?([-]?((d)|[ ]){1,12})+$/;
if (!patrn.exec(s)) return false
return true
}
//校验手机号码：必须以数字开头，除数字外，可含有“-”
程序代码
function isMobil(s)
{
var patrn=/^[+]{0,1}(d){1,3}[ ]?([-]?((d)|[ ]){1,12})+$/;
if (!patrn.exec(s)) return false
return true
}
//校验邮政编码
程序代码
function isPostalCode(s)
{
//var patrn=/^[a-zA-Z0-9]{3,12}$/;
var patrn=/^[a-zA-Z0-9 ]{3,12}$/;
if (!patrn.exec(s)) return false
return true
}
//校验搜索关键字
程序代码
function isSearch(s)
{
var patrn=/^[^`~!@#$%^&*()+=|][]{}:;',.<>/?]{1}[^`~!@$%^&()+=|][]{}:;',.<>?]{0,19}$/;
if (!patrn.exec(s)) return false
return true
}
程序代码
function isIP(s) //by zergling
{
var patrn=/^[0-9.]{1,20}$/;
if (!patrn.exec(s)) return false
return true
}
/**
* 功能：使指定值的指定名称的单复选框处于选中状态。
* radioName：单选框组件名
* val：指定值
*/
function makeRadioChecked(radioName, val) {
var obj = document.all[radioName];
try {
if (obj) {
if (obj.type == "radio" && obj.value == val) {
obj.checked = true;
}
for (var i = 0; i < obj.length; i++) {
if (obj[i].type == "radio" && obj[i].value == val) {
obj[i].checked = true;
break;
}
}
}
} catch(exception) {
alert("error");
}
}
自创javascrit分页代码。
function showpages(total,perpage,current,filename,seed,bShow){
//total总记录数，perpage每页记录数，current当前记录，filename文件名？page=，seed中间数字两边间隔数，bshow显示中间数字页面
//
var sRet,i,startPage,endPage,totalPage
//startPage:循环开始/endPage:循环结束/totalPage:总页数
//处理URL中的空格
if (filename!=''){
filename="&"+filename;
}
if (total % perpage==0 ){
totalPage=total/perpage;
}else{
totalPage=Math.floor(total/perpage)+1;
}
if (totalPage<=10){
startPage=1;
}else{
if ((current-seed) >0) {
startPage=current-seed;
}else{
startPage=1;
}
}
if (totalPage<=10) {
endPage=totalPage
}else{
if ((current+seed)<totalPage) {
endPage=current+seed
}else{
endPage=totalPage
}
}
if (current<seed) {
if (totalPage>10){
endPage=10
}
}
var sRet1=""
if (bShow) {
for (i=startPage;i<=endPage;i++)
{
if (i==current)
{
sRet1=sRet1+"<font style='background-color:#CCCC33;'><b>"+current+"</b></font> "
}
else
{
sRet1=sRet1+"<a href=?page="+i+filename+">"+i+"</a> "
}
}
}
sRet=""
//sRet=sRet+"<form name=jumpPage mothod=post action= >"
sRet=sRet+"<font class=tcat2>共"+total+"条,"
sRet=sRet+"第"+current+"页/共"+ totalPage+"页, "
sRet=sRet+"<a href=?page=1"+ filename+">第一页</a> "
if ((current==1)&&(current!=totalPage)){
sRet=sRet+" 上一页 "+sRet1+" <a href=?page="+(current+1) +filename+">下一页</a>"
}else{
if (current>1) {
if (current<totalPage) {
sRet=sRet+" <a href=?page="+(current-1)+filename+">上一页</a> "+sRet1+" <a href=?page="+(current+1)+filename+">下一页</a>"
}else{
if (current==totalPage) {
sRet=sRet+" <a href=?page="+(current-1)+filename+">上一页</a> "+sRet1+" 下一页"
}
}
}else{
sRet=sRet+" 上一页 "+sRet1+" 下一页"
}
}
sRet=sRet+" <a href=?page="+ totalPage+filename+">最末页</a>"
//sRet=sRet+"<input type=hidden name=wheretogo value=go> "
//sRet=sRet+"<input type=hidden name=maxpage value="+totalPage+">"
sRet=sRet+" 跳转到<input name=currentPage class=border1px size=3 onkeydown=if((event.keyCode==13)&&(this.value!='')&&(this.value!=0)&&(this.value<"+(totalPage+1)+"))window.location='?page='+this.value+'"+filename+"'; onkeyup=if(isNaN(this.value))this.value=''; >页 "
//sRet=sRet+"<input type=button value=GO class=border1px onclick=jump('"+filename+"');> "
sRet=sRet+"</font>"
//sRet=sRet+"</form>"
//alert(sRet);
document.write(sRet)
}
检查有没有空格
if(aa.indexOf(" ")>=0){
alert("aa中不允许含有空格！！");
document.myForm.aa.focus();
return false;
}
