js操作cookie

var cookieFun = {
"comparePdt":"YTTX_COMPDT",
"addCookie":function(objName,objValue,objHours){//添加cookie objHours=720(保存30天)
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;
},
"getCookie":function(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]);
 }  
},
"delCookie":function(name){//删除cookie
var exp = new Date();
exp.setTime(exp.getTime() - 1);
var cval=this.getCookie(name);
if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();
},
"setCookie":function(name,value){
var Days = 30; //此 cookie 将被保存 30 天
var exp = new Date();    //new Date("December 31, 9998");
exp.setTime(exp.getTime() + Days*24*60*60*1000);
document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();