How to make a link open multiple pages when clicked

You might want to arrange your HTML so that the user can still open all of the links even if JavaScript isn’t enabled. (We call this progressive enhancement.) If so, something like this might work well:

HTML

<ul class="yourlinks">
    <li><a href="http://www.google.com/"></li>
    <li><a href="http://www.yahoo.com/"></li>
</ul>

jQuery

$(function() { // On DOM content ready...
    var urls = [];

    $('.yourlinks a').each(function() {
        urls.push(this.href); // Store the URLs from the links...
    });

    var multilink = $('<a href="#">Click here</a>'); // Create a new link...
    multilink.click(function() {
        for (var i in urls) {
            window.open(urls[i]); // ...that opens each stored link in its own window when clicked...
        }
    });

    $('.yourlinks').replaceWith(multilink); // ...and replace the original HTML links with the new link.
});

This code assumes you’ll only want to use one “multilink” like this per page. (I’ve also not tested it, so it’s probably riddled with errors.)

HTML:

<a href="#" class="yourlink">Click Here</a>

JS:

$('a.yourlink').click(function(e) {
    e.preventDefault();
    window.open('http://yoururl1.com');
    window.open('http://yoururl2.com');
});

window.open also can take additional parameters. See them here: http://www.javascript-coder.com/window-popup/javascript-window-open.phtml

You should also know that window.open is sometimes blocked by popup blockers and/or ad-filters.

Addition from Paul below: This approach also places a dependency on JavaScript being enabled. Not typically a good idea, but sometimes necessary.

I did it in a simple way:

<a href="http://virtual-doctor.net" onclick="window.open('http://runningrss.com');
return true;">multiopen</a>

It'll open runningrss in a new window and virtual-doctor in same window.