var isWhole_re       = /^\s*\d+\s*$/;

// Check if string is a whole number
function isWhole (s) {
   return String(s).search (isWhole_re) != -1
}

function addToCart(productID,quantity) {
	if(isWhole(quantity)&&quantity>0){
	document.getElementById("hidden_cart").action = site_root + "store/index.php?main_page=product_info&products_id=" +productID + "&action=add_product";
	//alert("quantity:" + quantity);
	document.getElementById("products_id").value=productID;
	document.getElementById("cart_quantity").value=quantity;
	//alert(document.getElementById("cart_quantity").value);
document.forms["hidden_cart"].submit();
	}
	else{
	alert("The quantity entered is not valid. Please re-enter a quantity.");
	}
	}

function rowOverEffect() {  }
function rowOutEffect() {  }