Cookie的Javascrit方法

//expireHours设置为0，则永不过期；数字类型value存取后会变为字符串类型。

function addcookie(name,value,expireHours){
var cookieString=name+"="+escape(value);
if(expireHours>0){
var date=new Date();
date.setTime(date.getTime+expireHours*3600*1000);
cookieString=cookieString+"; expire="+date.toGMTString();
}
document.cookie=cookieString;
}

function getCookie(name){
var strCookie=document.cookie;
var arrCookie=strCookie.split("; ");
for(var i=0;i<arrCookie.length;i++){
var arr=arrCookie[i].split("=");
if(arr[0]==name)return arr[1];
}
return "";
}

function chkcookies(name){
var c = document.cookie.indexOf(name+"=");
if (c != -1){
return true;
}else
{
return false;
}
}