Javascript - Change src at onmouseover and onmouseout

Question

I want to do that onmouseover change the image and onmouseout it returns the default image. I use this code:

<div class="home-social-share">
<div style="margin-right:15px;width:11px;float:left;">
    <a href="javascript:void(0)" onclick="window.open('http://www.facebook.com/sharer.php?u=<?php the_permalink();?>&t=<?php the_title(); ?>','Condividi su Facebook','height=300, width=750,scrollbars=no, resizable=yes')">
        <img src="http://www.primapaginaonline.it/wp-content/themes/pponline/images/fbshareoff.png" alt="Condividi su Facebook" title="Condividi su Facebook" onmouseover="this.src='http://www.primapaginaonline.it/wp-content/themes/pponline/images/fbshare.png'" onmouseout="this.src='http://www.primapaginaonline.it/wp-content/themes/pponline/images/fbshareoff.png'">
    </a>
</div>
<div style="float:left;margin-right:15px;">
<a href="javascript:void(0)" onclick="window.open('http://twitter.com/share?text=<?php the_title(); ?> &bull; Prima Pagina Online&amp;url=<?php the_permalink(); ?>','Condividi su Twitter','height=300, width=500,scrollbars=no, resizable=yes')">
        <img src="http://www.primapaginaonline.it/wp-content/themes/pponline/images/tt-shareoff.png" alt="Condividi su Twitter" title="Condividi su Twitter" onmouseover="this.src='http://www.primapaginaonline.it/wp-content/themes/pponline/images/tt-share.png'" onmouseout="this.src='http://www.primapaginaonline.it/wp-content/themes/pponline/images/tt-shareoff.png'" />
</a>
</div>
<div style="float:left;">
    <a href="<?php the_permalink();?>/#disqus_thread">
        <img src="http://www.primapaginaonline.it/wp-content/themes/pponline/images/pencil-off.png" alt="Commenta l'articolo" title="Scrivi un commento sull'articolo" onmouseover="this.src='http://www.primapaginaonline.it/wp-content/themes/pponline/images/pencil.png'" onmouseout="this.src='http://www.primapaginaonline.it/wp-content/themes/pponline/images/pencil-off.png'" />
    </a>
</div>

Now, it works the onclick functions but the images remains the same, so the onmouseover and onmouseout doesn't work.

Thanks

Answer 1

I'm unsure whether your using Jquery or not, so I'll include examples of both.

<img id="change" src="picture" alt="picture.jpg">

Jquery -

$('#change').on("mouseenter", function() {
    $(this).attr('src', 'picture2');
}).on("mouseleave", function() {
    $(this).attr('src', 'picture');
});

Javascript -

document.getElementById('change').addEventListener("onmouseover", function() { 
  this.src = 'picture2';
}).addEventListener("onmouseout", function() {
  this.src = 'picture';
});

That should get you going!