// JavaScript Document

$(document).ready(function(){

$(".rollover img").hover( function()
 {
  this.src = this.src.replace("_off","_on");
 },
 function()
 {
  this.src = this.src.replace("_on","_off");
 }
);
});

$(window).resize(function(){
 
  $('#wrapper').css({
        position:'absolute',
        left: ($(document).width() - $('#wrapper').outerWidth())/2,
	    top: ($(document).height() - $('#wrapper').outerHeight())/2
    });
	 
});