window.addEvent('domready', function() {
				  
				  // set tshirts
				  var tshirts = $$('div#tshirts');
				  
 				  $('color-1').addEvent('mouseover', function() {
										  tshirts.setStyle('background-position', '0 0');
										});
 				  $('color-2').addEvent('mouseover', function() {
										  tshirts.setStyle('background-position', '0 -260px');
										});
 				  $('color-3').addEvent('mouseover', function() {
										  tshirts.setStyle('background-position', '0 -520px');
										});
 				  $('color-4').addEvent('mouseover', function() {
										  tshirts.setStyle('background-position', '0 -780px');
										});
 				  $('color-5').addEvent('mouseover', function() {
										  tshirts.setStyle('background-position', '0 -1040px');
										});
				  
				});