JQuery
From Wikicliki
jquery image hover
this image rollover only requires you to apply the class ro to the image. it will swap in _o into the file name for an easy image swap using jquery.
<script type="text/javascript"> $(document).ready( function() { PEPS.rollover.init(); }); PEPS = {}; PEPS.rollover = { init: function() { this.preload(); $(".ro").hover( function () { $(this).attr( 'src', PEPS.rollover.newimage($(this).attr('src')) ); }, function () { $(this).attr( 'src', PEPS.rollover.oldimage($(this).attr('src')) ); } ); }, preload: function() { $(window).bind('load', function() { $('.ro').each( function( key, elm ) { $('<img>').attr( 'src', PEPS.rollover.newimage( $(this).attr('src') ) ); }); }); }, newimage: function( src ) { return src.substring( 0, src.search(/(\.[a-z]+)/) ) + '_o' + src.match(/(\.[a-z]+)/)[0]; }, oldimage: function( src ){ return src.replace(/_o/, ''); } }; </script>