function update() {
	var objForm = document.getElementById('cart_quantity');
	if (objForm) {
		forminputs = objForm.getElementsByTagName('input');
		for (i = 0; i < forminputs.length; i++) {
			// regex here to check name attribute
			var regex = new RegExp('cart_delete', "i");
			if (regex.test(forminputs[i].getAttribute('name'))) {
				forminputs[i].value = '';
			}
		}
		objForm.submit();
	}
}

function removeProduct(productID) {
	var objForm = document.getElementById('cart_quantity');
	if (objForm) {
		forminputs = objForm.getElementsByTagName('input');
		for (i = 0; i < forminputs.length; i++) {
			// regex here to check name attribute
			var regex = new RegExp('cart_delete', "i");
			if (regex.test(forminputs[i].getAttribute('name'))) {
				if (forminputs[i].value == productID) {
					forminputs[i].value = productID;
				} else {
					forminputs[i].value = '';
				}
			}
		}
		objForm.submit();
	}		
}