//写cookies函数 作者：翟振凯
function SetCookie(name,value)//两个参数，一个是cookie的名子，一个是值
{
    var Days = 1; //此 cookie 将被保存 1 天
    var exp  = new Date();    //new Date("December 31, 9998");
    exp.setTime(exp.getTime() + Days*24*60*60*1000);
    document.cookie = name + "=" + escape(value) + "; path=/;expires=" + exp.toGMTString();
}
function GetCookie(name)//取cookies函数        
{
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
     if(arr != null) return unescape(arr[2]); return null;

}
function DelCookie(name)//删除cookie
{
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval = GetCookie(name);
    if (cval != null) {
        document.cookie = name + "=" + cval + "; path=/;expires=" + exp.toGMTString();
        //document.cookie = name + "=" + cval + "; path=/set/;expires=" + exp.toGMTString();
    }

 
}
//if (getCookie("citycode") == null) {
//    SetCookie("citycode", "22")
//    SetCookie("cityname", "广州")
//}