JS使用Cookie

//设置cookie,此处time的单位为秒。

setCookie('name','内容',"s60");

    function setCookie(name,value,time)
    {
        var strsec = getsec(time);
        var exp = new Date();
        exp.setTime(exp.getTime() + strsec*1);
        document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
    }
    function getsec(str)
    {
        var str1=str.substring(1,str.length)*1;
        var str2=str.substring(0,1);
        if (str2=="s")
        {
            return str1*1000;
        }
        else if (str2=="h")
        {
            return str1*60*60*1000;
        }
        else if (str2=="d")
        {
            return str1*24*60*60*1000;
        }
    }

// 读取cookie

var user_name = getCookie('name');

    function getCookie(name)
    {
        var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
        if(arr=document.cookie.match(reg))
            return unescape(arr[2]);
        else
            return null;
    }

// 删除cookie

delCookie('name');

    function delCookie(name)
    {
        var exp = new Date();
        exp.setTime(exp.getTime() - 1);
        var cval=getCookie(name);
        if(cval!=null)
            document.cookie= name + "="+cval+";expires="+exp.toGMTString();
    }