JS获取后台Cookies值的小例子

function getCookie(name)
    {    
        var offset,cookieValue;
        var search=name+"=";
        if(document.cookie.length>0)
        {
            offset=document.cookie.indexOf(search);
            if(offset!=-1)
            {
                offset += search.length;   
                end = document.cookie.indexOf(";", offset);   
                if (end == -1) 
                    end = document.cookie.length;   
                cookieValue=unescape(document.cookie.substring(offset, end));
            }
        }
        return cookieValue;
    } 
//name表示cookie的键的名字