js保存数据到cookie
history.js 文件
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var addHistory=function(num,id){
stringCookie=getCookie('history');
var stringHistory=""!=stringCookie?stringCookie:"{history:[]}";
var json=new JSON(stringHistory);
var e="{num:"+num+",id:"+id+"}";
//alert(e);
json['history'].push(e);//添加一个新的记录
//alert(json.toString());
setCookie('history',json.toString(),30);
}
//显示历史记录
var DisplayHistory=function(){
var p_ele=document.getElementById('history');
while (p_ele.firstChild) {
p_ele.removeChild(p_ele.firstChild);
}
var historyJSON=getCookie('history');
alert(historyJSON);
var json=new JSON(historyJSON);
var displayNum=6;
for(i=json['history'].length-1;i>0;i--){
addLi(json['history'][i]['num'],json['history'][i]['id'],"history");
displayNum--;
if(displayNum==0){break;}
}
}
//添加一个li元素
var addLi=function(num,id,pid){
var a=document.createElement('a');
var href='product.action?pid='+id;
a.setAttribute('href',href);
var t=document.createTextNode(num);
a.appendChild(t);
var li=document.createElement('li');
li.appendChild(a);
document.getElementById(pid).appendChild(li);
}
//添加cookie
var setCookie=function(c_name,value,expiredays){
var exdate=new Date()
exdate.setDate(exdate.getDate()+expiredays)
cookieVal=c_name+ "=" +escape(value)+((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
alert(cookieVal);
document.cookie=cookieVal;
}
//获取cookie
function getCookie(c_name){
//alert(document.cookie.length>0);
if (document.cookie.length>0){
c_start=document.cookie.indexOf(c_name + "=")
if (c_start!=-1){
c_start=c_start + c_name.length+1
c_end=document.cookie.indexOf(";",c_start)
if (c_end==-1) c_end=document.cookie.length
// document.write(document.cookie.substring(c_start,c_end)+"<br>");
return unescape(document.cookie.substring(c_start,c_end))
}
}
return ""
}
json.js 文件//定义一种数据类型
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var JSON = function(sJSON){
this.objType = (typeof sJSON);
this.self = [];
(function(s,o){for(var i in o){o.hasOwnProperty(i)&&(s[i]=o[i],s.self[i]=o[i])};})(this,(this.objType=='string')?eval("0,"+sJSON):sJSON);
}
JSON.prototype = {
toString:function(){
return this.getString();
},
valueOf:function(){
return this.getString();
},
getString:function(){
var sA = [];
(function(o){
var oo = null;
sA.push('{');
for(var i in o){
if(o.hasOwnProperty(i) && i!='prototype'){
oo = o[i];
if(oo instanceof Array){
sA.push(i+':[');
for(var b in oo){
if(oo.hasOwnProperty(b) && b!='prototype'){
sA.push(oo[b]+',');
if(typeof oo[b]=='object') arguments.callee(oo[b]);
}
}
sA.push('],');
continue;
}else{
sA.push(i+':'+oo+',');
}
if(typeof oo=='object') arguments.callee(oo);
}
}
sA.push('},');
})(this.self);
return sA.slice(0).join('').replace(/\[object object\],/ig,'').replace(/,\}/g,'}').replace(/,\]/g,']').slice(0,-1);
},
push:function(sName,sValue){
this.self[sName] = sValue;
this[sName] = sValue;
}
}
//具体执行文件
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,minimum-scale=1,user-scalable=no"/>
<meta name="apple-mobile-web-app-capable" content="yes" />
<title>cookie</title>
<script type="text/javascript" src="../js/json.js"></script>
<script type="text/javascript" src="../js/history.js"></script>
<script>
addHistory(15810782304,2);
addHistory(64654665,2);
addHistory(6843212,2);
addHistory(84984432521,2);
setInterval("DisplayHistory()",1000);
</script>
</head>
<body>
<ul id="history"></ul>
</body>
</html>
