function openimage(filename,width,height){
	image = window.open('/includes/asp/viewimage.asp?location='+filename, 'image', 'toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,width='+width+',height='+height);
	image.focus();
}

function addItem(productid,quantity_ref){
	quantity = quantity_ref.value;
	if (!(isInteger(quantity) && quantity*1>0)){
		alert('Please enter a valid quantity for this item.');
		quantity_ref.value = '1';
		return false;
	} else {
		location.href='/basket.asp?command=add&productid='+productid+'&quantity='+quantity;
	}
}

function viewBasket(){
  location.href = '/basket.asp';
}