How to add current url with parameters infront of .attr("href")?

I hav开发者_如何学运维e external links <a href="http://notmysite.com/">Link</a> and I'd need to add: http://myurl.com?url= before the external link's href.

Making it

<a href="http://myurl.com/current/page?url=http://notmysite.com/">

My current js code:

  $.expr[':'].external = function(obj){
      return !obj.href.match(/^mailto\:/)
              && (obj.hostname != location.hostname);
  };
  $('a:external').addClass('external').attr("href", window.location+("href"));

It doesn't work. I'm guessing it's syntax.

I'm rather new to jquery, so would prefer a dirtier/straight forward approach to this

Cheers!

---

Try the following, which takes care to escape the URL before appending it to the gateway URL matches more URLs, and is slightly optimized:

var externalLinkPattern = new RegExp("^http://" + window.location.host, "i"),
    gateway             = "http://myurl.com/current/page?url=";

$("a[href^='http:']").each(function() {
    if ( !externalLinkPattern.test(this.href) ) {
        this.href = gateway + escape(this.href);
        $(this).addClass("external");
    }
});

---

With the following:

$("a[href^='http:']:not([href*='"+window.location.host+"'])").each(function(){
  $(this)
    .attr("href","http://mysite.com?url="+$(this).attr("href"))
    .addClass("external");
});

This HTML:

<a href="http://www.google.com">Google</a>
<a href="http://localhost/somepage.html">Localhost</a>

Becomes this:

<a class="external" href="http://mysite.com?url=http://www.google.com">Google</a>
<a href="http://localhost/somepage.html">Localhost</a>

---

Here's what we use on insightcruises.com, which rewrites all outbound URLs as prefixed with http://insightcruises.com/cgi/go/:

jQuery(function ($) {
        $('a[href^=http:]').each(function () {
                var $this = $(this);
                var href = $this.attr('href');
                href = href.replace(/#/, '%23');
                var newhref = 'http://insightcruises.com/cgi/go/'+href;
                // $('<p />').text(newhref).appendTo('body');                   
                $this.attr('href', newhref);
            });
    });
window.cgigo = function (url, windowName, windowFeatures) {
    if (url.match(/^http:/)) {
        url = url.replace(/\#/, '%23');
        url = 'http://insightcruises.com/cgi/go/'+url;
    };
    window.open(url, windowName, windowFeatures);
};