window.location.href="url"ie和chrome、firefox跳转路径不一样问题

var browser = navigator.userAgent ;
//alert(browser);
if(browser.indexOf("Chrome")!=-1 || browser.indexOf("Firefox") != -1 ) {
    alert("是firefox  和 chrome");
    window.location.href="moder/excelOut_GoldOutput?tableColumn="+tableColumn+"&starttime="+starttime+"&endtime="+endtime+"&pageNo="+pageNo+"&pageSize="+pageSize;
}else{
 alert("是ie");
 window.location.href="excelOut_GoldOutput?tableColumn="+tableColumn+"&starttime="+starttime+"&endtime="+endtime+"&pageNo="+pageNo+"&pageSize="+pageSize;
}