function changeProductImage() {

	if(document.getElementById("product_thumbnails")) 
	{
		var thumbnail_box   = document.getElementById("product_thumbnails");
		var thumbnail_links = thumbnail_box.getElementsByTagName('img');
		var new_image_path  = '';
		
		for (var i = 0; i < thumbnail_links.length; i++) 
		{	
			thumbnail_links[i].onclick = function() 
			{
				new_image_path = this.src.replace('thumbnails/','');
			
				if(document.getElementById("detail_image")) 
				{
					document.getElementById("detail_image").src = new_image_path;
				}
			}
		}
	}
}

addHandler('load',window,changeProductImage);