<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script type="text/javascript">
//设置cookie；
function setCookie(name,value,iDay){
var oDate=new Date();
oDate.setDate(oDate.getDate()+iDay);
document.cookie=name+‘=‘+value+‘;expires‘+oDate;
}
//获得cookie；
function getCookie(name){
var arr=document.cookie.split(‘;‘);
for(var i=0;i<arr.length;i++){
var arr2=arr[i].split(‘=‘);
if(arr2[0]==name){
return arr2[1];
}
}
return " ";
}
function removeCookie(name){
setCookie(name,1,-1);
}
window.onload= function () {
var oForm=document.getElementById("frm1");
var oUser=document.getElementsByName(‘user‘)[0];
oForm.onsubmit=function(){
setCookie(‘user‘,oUser.value,14);
};
};
</script>
</head>
<body>
<form id="frm1" action="http://www.simon.com/">
用户名：<input type="text" name="user"/><br>
密码：<input type="password"name="pass"/><br>
<input type="submit" value="登录"/>
</form>
</body>
</html>
原文：http://www.cnblogs.com/Aaron-dzl/p/5828692.html