多样的Url正则表达式（适合Jquery.validate.js中url验证替换）

首先，参考博客：

http://jamcode.iteye.com/blog/1397824

http://orzfly.com/html/regex-match-url.html

其次，总结出适合多样化的Url正则表达式：

e.g

    var re=/^((http|https|ftp)://)?(w(:w)?@)?([0-9a-z_-]+.)*?([a-z]{2,6}(.[a-z]{2})?(:[0-9]{2,6})?)((/[^?#<>/\*":]*)+(?[^#]*)?(#.*)?)?$/i;  
      
    assert(re.test("index.im"));  
    assert(re.test("http://index.im"));  
    assert(re.test("http://index.im/robots.txt"));  
    assert(re.test("www.index.im/robots.txt"));  
    assert(re.test("https://index.im/favicon.ico"));  
    assert(re.test("http://www.index.im/?search=Go"));  
    assert(re.test("websize/index.htm"));
    assert(re.test("http://www.index.im:80/home?search=Go"));
    //..............  
    //..............