动态截取字符串获取当前网页的URL地址

 

var url = window.location;
                    var urlArr = url.toString().split(‘/‘);
                    var ustr = urlArr[4]
if(typeof(ustr) =="undefined")
{
}
else
{
$("#w-down").attr("style","background:url(../../../images/down.png)  center center;)");
                                        $("#w-btn").attr("style","background:url(../../../images/close.png)  no-repeat;) ");
                                        $("#w-top").attr("style","background:url(../../../images/up.png)  no-repeat;)");


}