javascript获取网页参数

          function  GetQueryString(name)  
                            {  
                                var reg = new RegExp("(^|&)"+name+"=([^&]*)(&|$)");  
                                var r   = window.location.search.substr(1).match(reg);  
                                if (r!=null) return unescape(r[2]);  return   null;  
                            }

          videoName = videoName + GetQueryString("videoName");

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