如何用JS取得网址中的文件名原创

var a="http://www.jb51.net/html/images/logo.gif";

var b=a.split("/");
console.log(b); // ["http:", "", "www.jb51.net", "html", "images", "logo.gif"]

var c=b.slice(b.length-1, b.length).toString(String).split(".");
console.log(c); // ["logo", "gif"]

alert("获取的文件名为:" + c.slice(0, 1)); // 获取的文件名为:logo