$(function(){
	$("ul.sf-menu").superfish();
	
	$(".pv").submit(function(){
		var allEmpty = true;
		$(".pvTbl input[name='quantity\[\]']").each(function(){
			var num = Number(this.value);
			if(num > 0) {
				allEmpty = false;
			}
		});
		if(allEmpty) {
			alert("Please select the quantity of the product you wish to buy and click add to basket.  You must enter a value in the quantity box before you can add a product to your basket");
			return false;
		}
		return true;
	});

});