function switchModalWindowImage(imageNumber){
	switch(imageNumber){
		case 2:
			image = 'fabric';
			break;
		case 1:
		default:
			imageNumber = 1;
			image = 'controller';
			break;
	}
	$('modal_content_image').src = "/web_images/products/gl_"+image+"_lg.jpg";
	$$('a.thumbnail_modal').each(function(element){
		element.down().removeClassName('modal_selected');
		element.down().addClassName('modal_unselected');
	});
	var a = $$('a.thumbnail_modal');
	a[imageNumber-1].down().removeClassName('modal_unselected');
	a[imageNumber-1].down().addClassName('modal_selected');
	//alert(a[imageNumber].down());
}