$(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 ){
		var cleanSrc = src.replace(/_o/, ''); // Original src cannot have '_o' in the file name
		var srcLength = cleanSrc.length;
		var coreLength = srcLength - 4; // length of string with out the '.jpg, .png, .gif, etc'
		var srcCore = cleanSrc.substr(0,coreLength); // get the stripped src
		var srcSuffix = cleanSrc.substr(coreLength,4); // get the suffix '.jpg, etc'
		return srcCore + '_o' + srcSuffix;
		//return cleanSrc.substring( 0, cleanSrc.search(/(\.[a-z]+)/) ) + '_o' + cleanSrc.match(/(\.[a-z]+)/)[0];
	},
     oldimage: function( src ){ return src.replace(/_o/, ''); }
  };