js获取url参数值

 //接收网址参数
        function GetUrlParameter(paramName)
        {
            var returnVal="";
            try{
                var paramUrl=window.location.search;
                //处理长度
                if(paramUrl.length>0){
                    paramUrl=paramUrl.substring(1,paramUrl.length);
                    var paramUrlArray=paramUrl.split("&");
                    for(var i=0;i<paramUrlArray.length;i++){
                        if(paramUrlArray[i].toLowerCase().indexOf(paramName.toLowerCase())!=-1){
                            var temp=paramUrlArray[i].split("=");
                            if(temp[0].toLowerCase()==paramName.toLowerCase()){
                                returnVal=temp[1];
                                break;
                            }
                        }
                    }
                }
            }
            catch(e){}
            return returnVal;
        }