$(document).ready(function() {
 // get the original product image source  
var origImage = $('.col2 img.large').attr('src');    

// do the swapping here  
$('.col2 img').hover(function(){  
	$('.col2 img.large').attr('src', this.src);  
	$(this).css('cursor', 'pointer');  
},function() {   
	$('.col2 img.large').attr('src', origImage); // reset back to the original image src  
})
});