function cart_setQuantity(elem, id) {
	
	var qty = $F(elem);
	
	var url = 'shopping_cart.php?action=update_product&type=ajax';
	var params = 'cart_quantity[0]=' + qty + '&products_id[0]=' + id;
	
	new Ajax.Request(

		url , {

			method: 'post',
			parameters: params,
			onComplete: function( response ) {

				var html = response.responseText.split('|#|');
				
				$('contentpane').innerHTML = html[0];
				$('sidepane_shoppingCart').innerHTML = html[1];
			}
		}
	);
}