针对不同浏览器跳转路径

//URL路径截取
function formatUrl(url) {
var txt = "";
var urlStr = window.location.href;
var headUrl = urlStr.split('/');
var newUrl = "";
for (var i = 0; i < headUrl.length; i++) {
newUrl += headUrl[i] + "/";
if (i > 2) { break; }
}
// return newUrl + url;
alert(newUrl);
}