[zilker]

QVS, below is the javascript form validation for version 4.0.6. I'm going to go out on a limb and say that it should work for any version 4 cart. Highlight the entire code and paste it over the existing code in /form_validation_js.tpl.

It worked for me ~ BUT ~ back up your original before you try the change ~ just to be safe.

{* $Id: form_validation_js.tpl,v 1.2.2.3 2004/08/11 12:04:13 max Exp $ *}
<SCRIPT type="text/javascript" language="JavaScript 1.2">
function FormValidation() {ldelim}

    {if $active_modules.Product_Options ne '' && $product_options ne ''}
    if(!check_exceptions()) {ldelim}
        alert(exception_msg);
        return false;
    {rdelim}
	{if $product_options_js ne ''}
	{$product_options_js}
	{/if}
    {/if}

	if(document.getElementById('product_avail'))
	    if(document.getElementById('product_avail').value == 0) {ldelim}
    	    alert("{$lng.txt_out_of_stock|replace:"\n":"
"|replace:"\r":" "|replace:'"':'\"'}");
        	return false;
	    {rdelim}
if(parseInt(document.orderform.amount.value) >= parseInt(document.orderform.minamount.value)) 

   return true; 

else 
{ldelim}
   alert("{"The quantity you entered was invalid.  Please enter the appropriate quantity to add this product to your cart."|replace:"\n":" "|replace:"\r":" "}"); 
   return false; 
{rdelim}

    return true;
{rdelim}
</SCRIPT>

Let me know how it works.