function getQueryStr(str){
                var url=location.href;
                var rs = new RegExp("(^|)"+str+"=([^\&]*)(\&|$)","gi").exec(url), tmp;

                if(tmp=rs){
                    return tmp[2];
                }

                // parameter cannot be found
                return "";
            }

function parseUrl(){
                var url=location.href;
                var i=url.indexOf('?');
                if(i==-1)return;
                var querystr=url.substr(i+1);
                var arr1=querystr.split('&');
                var arr2=new Object();
                for  (i in arr1){
                    var ta=arr1[i].split('=');
                    arr2[ta[0]]=ta[1];
                }
                return arr2;
            }