Cookie

//根据名称获取cookie值

    getCookie:function(cname){

        var name = cname + "=";

        var ca = document.cookie.split(';');

        for(var i=0; i<ca.length; i++)

        {

        　　var c = ca[i].trim();

        　　if (c.indexOf(name)==0){

　　　　　　return c.substring(name.length,c.length);

　　　　 } 

        }

        return "";

},