js操作COOKIES

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=GB2312" /> <title>cookie处理函数练习(为我所写，非我所想:改善面向对象)</title> <script language="JavaScript" type="text/javascript"> function addCookie(objName,objValue,objHours){//添加cookie var str = objName + "=" + escape(objValue); if(objHours > 0){//为0时不设定过期时间，浏览器关闭时cookie自动消失 var date = new Date(); var ms = objHours*3600*1000; date.setTime(date.getTime() + ms); str += "; expires=" + date.toGMTString(); } document.cookie = str; alert("添加cookie成功"); } function getCookie(objName){//获取指定名称的cookie的值 var arrStr = document.cookie.split("; "); for(var i = 0;i < arrStr.length;i ++){ var temp = arrStr[i].split("="); if(temp[0] == objName) return unescape(temp[1]); } } function delCookie(name){//为了删除指定名称的cookie，可以将其过期时间设定为一个过去的时间 var date = new Date(); date.setTime(date.getTime() - 10000); document.cookie = name + "=a; expires=" + date.toGMTString(); } //读取出来所有的cookie字筗串了 function allCookie(){//读取所有保存的cookie字符串 var str = document.cookie; if(str == ""){ str = "没有保存任何cookie"; } alert(str); } function $(m,n){ return document.forms[m].elements[n].value; } function add_(){ var cookie_name = $("myform","cookie_name"); var cookie_value = $("myform","cookie_value"); var cookie_expireHours = $("myform","cookie_expiresHours"); addCookie(cookie_name,cookie_value,cookie_expireHours); } function get_(){ var cookie_name = $("myform","cookie_name"); var cookie_value = getCookie(cookie_name); alert(cookie_value); } function del_(){ var cookie_name = $("myform","cookie_name"); delCookie(cookie_name); alert("删除成功"); } </script> //添加cookie function addCookie(name,value,expires,path,domain){ var str=name+"="+escape(value); if(expires!=""){ var date=new Date(); date.setTime(date.getTime()+expires*24*3600*1000);//expires单位为天 str+=";expires="+date.toGMTString(); } if(path!=""){ str+=";path="+path;//指定可访问cookie的目录 } if(domain!=""){ str+=";domain="+domain;//指定可访问cookie的域 } document.cookie=str; } //取得cookie function getCookie(name){ var str=document.cookie.split(";") for(var i=0;i<str.length;i++){ var str2=str[i].split(”=”); if(str2[0]==name)return unescape(str2[1]); } } //删除cookie function delCookie(name){ var date=new Date(); date.setTime(date.getTime()-10000); document.cookie=name+”=n;expire=”+date.toGMTString();