function GetStockID(formID)
	// Returns the StockID for the selected form
	{
		var VariantIndex = document.forms['f' + formID].Variant.selectedIndex;
		return document.forms['f' + formID].Variant.options[VariantIndex].value;
		
	}
	
	function InStock(formID, StockID)
	// Determines whether an item is in stock
	{
		// Lookup value of hidden InStock field for this StockID
		if (document.forms['f' + formID]['InStock' + StockID].value == 'yes')
		{
		return true;
		}
		else
		{
		return false;
		}
	}
	
	function SiblingChange(formID)
	// Displays the correct Buy One or Out Of Stock button in the selected form
	// and changes the URL on the product image
	{
		var id
		id = "ProdPic" + formID;
		
		// Set the image's URL to a hidden form field value, so that the correct script is run if the
		// image is clicked.
		document.getElementById(id).href = document.forms['f' + formID]['VariantHref' + formID].value

		// Use function to return StockID
		var StockID = GetStockID(formID);
		if (StockID != 0)
		{
			// Use function to display correct button
			buyoutImage(formID, StockID)
		}
	}
	function buyoutImage(formID, StockID)
	// Display correct button for Buy One / Out of Stock
	{
		// Use function to see if item is in stock
		if (InStock(formID, StockID))
		{
			// Item is in stock, so display Buy One
			document.images['buyout' + formID].src = "/Style/Grindstore/images/hd2002/buyone.gif";
			document.images['buyout' + formID].alt = "click here to buy this item";
		}
		else
		{
			// Item is out of stock, so display Notify
			document.images['buyout' + formID].src = "/Style/Grindstore/images/hd2002/outofstock.gif";
			document.images['buyout' + formID].alt = "Notify me when there is some in stock";
		}
	}
	function GoForth(formID, NewAddress)
	// Redirect to the correct page for more details or postcard
	{
		// Use function to return StockID
		var StockID = GetStockID(formID);
		if (StockID == 0)
		{
			// No item selected, so alert the user
			alert('Please select an entry from the drop-down list');
		}
		else
		{
			try //Disable the Buy Now image's anchor or the BuyNow button, whilst the page submission is going on
			{
				if (document.all.BuyOneLink)
				{
					document.all.BuyOneLink.href = '#';
				}
				if (document.forms['f' + formID].Variant)
				{
					document.forms['f' + formID].Variant.onclick = '';
				}
				
			}
			catch(e) //Not found, do nothing
			{
			}
			finally //Continue
			{
				// Work out where to go
				window.location = '/' + NewAddress + '&stockid=' + StockID;
			}
		}
	}
	function GoForthReWrite(formID, NewAddress)
	// Redirect to the correct page for more details or postcard
	{
		// Use function to return StockID
		var StockID = GetStockID(formID);
		if (StockID == 0)
		{
			// No item selected, so alert the user
			alert('Please select an entry from the drop-down list');
		}
		else
		{
			// Work out where to go
			window.location = NewAddress + '-stockid-' + StockID + '.html';
		}
	}
	
	
	function GoSubmit(formID)
	// Either validate the form or pop up the Notify screen
	{
		// Use function to return StockID
		var StockID = GetStockID(formID);
		if (StockID == 0)
		{
			// No item selected, so alert the user
			alert('Please select an entry from the drop-down list');
		}
		else
		{
			// Use function to see if item is in stock
			if (InStock(formID, StockID))
			{
				// Item is in stock, so let the user buy one...
				// Update the hidden AddToCart field with the correct stockID
				document.forms['f' + formID]['AddToCart' + formID].value = StockID
				//Update the hidden Qty and MaxQty fields with the correct values
				document.forms['f' + formID]['Qty' + formID].value = 1
				document.forms['f' + formID]['MaxQty' + formID].value = document.forms['f' + formID]['MaxQty' + StockID].value
				// Use the common validateFields function to submit the form
				validateFields('f' + formID, formID, StockID);
			}
			else
			{
				// Item is out of stock, so display Notify
				PopupNotify('/InStockNotify.asp?ID=' + StockID, 250, 300);
			}
		}
	}
	function GoSubmitShop(formID)
	// Validate the form
	{
		// Use function to return StockID
		var StockID = GetStockID(formID);
		if (StockID == 0)
		{
			// No item selected, so alert the user
			alert('Please select an entry from the drop-down list to');
		}
		else
		{
			// Update the hidden AddToCart field with the correct stockID
			document.forms['f' + formID]['AddToCart' + formID].value = StockID;
			// Submit the form
			document.forms['f' + formID].submit();
		}
	}
	function OpenWin(formID, StockID, CID) 
	// Open popup window with passed StockID or StockID from the form
	{
		var Id = 0;
		//No form passed
		if (formID == 0)
		{
			//Use passed StockID
			Id = StockID;
		}
		else
		{
			//Use variant StockID from the form
			Id = GetStockID(formID);
			if (Id == 0)
			{
				// No item selected, so alert the user
				alert('Please select an entry from the drop-down list');
			}
		}
		if (Id != 0)
		//Have an Id, so open the popup
		{
			var newWind = window.open("popup.asp?CID=" + CID + "&StockID=" + Id , "PopUp", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width=370,height=530");
			if (navigator.userAgent.substring(0,9) == "Mozilla/4")
			{
				newWind.focus();
			}
		}
	}
	function GoSubmitShopPopUp(formID, StockID)
	// Validate the form and spoof posting to the opener window
	{
		var ID = 0;
		if (StockID == 0)
		{
			// Use function to return StockID
			ID = GetStockID(formID);
		}
		else
		{
			//use passed StockID
			ID = StockID;
		}
		if (ID == 0)
		{
			// No item selected, so alert the user
			alert('Please select an entry from the drop-down list');
		}
		else
		{
			// Write the form contents to a querystring
			var strLocation = document.forms['f' + formID].action;
			strLocation = strLocation + '&CatID=' + document.forms['f' + formID].CID.value;
			strLocation = strLocation + '&CID=' + document.forms['f' + formID].CID.value;
			strLocation = strLocation + '&function=add';
			strLocation = strLocation + '&recordCount=1';
			strLocation = strLocation + '&AddToCart' + formID + '=' + ID;
			strLocation = strLocation + '&Qty' + formID + '=1';
			// Spoof Submission of the form to the opener window
			window.opener.location = strLocation
			window.close()
		}
	}
	
	//Preload Images
	if (document.images) 
	{
		imgbuyone = new Image();
		imgoutofstock = new Image();
		imgbuyone.src = "/images/buyone.gif";
		imgoutofstock.src = "/images/outofstock.gif"
	}