JS 新增Cookie 取cookie值 删除cookie 举例详解

    function setCookie(name,value) 
    { 
        var Days = 30; 
        var exp = new Date(); 
        exp.setTime(exp.getTime() + Days*24*60*60*1000); 
        document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString(); 
        var strsec = getsec(time); 
        var exp = new Date(); 
        exp.setTime(exp.getTime() + strsec*1); 
        document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString(); 
    } 
    //读取cookies 
    function getCookie(name) 
    { 
        var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)"); 
        if(arr=document.cookie.match(reg)) 
            return (unescape(arr[2])); 
        else 
            return null; 
    } 
    //删除cookies 
    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(); 
    }