Determine which the link is hashtag

I'm a beginner with using jQuery and am experiencing a question.

I made a gallery and the gallery links are added to facilitate the hashtags user. For example, if 开发者_开发技巧you add a favorite link, to access the page will see the right image, because the hash tag is present in the link.

The gallery is almost working, actually I just wanted to add a class to make the selected image set.

$gallery = window.location.hash;

//If have no hashtag, adds the class on the first image
if( $gallery == '')
    jQuery('.gallery-nav ul li').children('a').first().addClass('current');
else
{
    jQuery('.gallery-nav ul li').each(function($i){
        $link_hash = jQuery(this).find('a').attr('href');

        if( $link_hash == $gallery)
        {
            alert ( $link_hash );
        }
    });
}

Until the first part, "If have no hashtag, adds the class on the first image" is working right, but then I do not know how. For example, if the the link is: http://example.net/gallery.php#3, I want to add the class on the third link.

In the above function, it shows the alert correctly. When it reaches the selected link it shows the alert. But I do not know how to add the class in the link.

Could anyone help me? Thanks.

You could just select that element directly using the attribute-ends-with-selector^(docs) to choose the element where the href ends with the value of $gallery. (I assume there are fewer than ten.)

As you can see, the $gallery is concatenated into the selector string.

else {
    jQuery('.gallery-nav ul li a[href$=' + $gallery + ']').addClass('current');
}