function check_form(x) {

		submitOK="True";
		var message = "";
  		var flg = false; 


		message = "Form incomplete, please \n\n";

		if (x.ht_name.value == "")
 		{ message += "- Enter your name\n";							submitOK="False"; }

		if (x.ht_delivery_address.value == "")
 		{ message += "- Enter your delivery address\n";					submitOK="False"; }

		if (x.ht_postcode.value == "")
 		{ message += "- Enter your postcode\n";						submitOK="False"; }

		if (x.ht_country.value == "")
 		{ message += "- Enter the country of your delivery address\n";		submitOK="False"; }

		if (x.ht_email.value == "")
 		{ message += "- Enter your email address\n";					submitOK="False"; }

		if (x.ht_email.value.length > 2 && !isValidEmail (x.ht_email.value))
		{ message += "- Enter a valid email address\n";					submitOK="False"; }

		if (x.ht_tel.value == "")
 		{ message += "- Enter your telephone number\n";					submitOK="False"; }

		if (x.ht_zone.value == "")
 		{ message += "- Select a delivery zone for postage\n";			submitOK="False"; }

		var flg = chk_other (x.ht_how);

		if (flg && x.ht_other.value == "")
 		{ message += "- Explain how you found our website\n";				submitOK="False"; }



  		var elm=document.formX.elements['ht_qty[]'];

		if (elm) { 
			flg = false; 
  			for(i=0; i<elm.length; i++) {
   				if(elm[i].value != "") {
     					flg=true;
					break;
				}
				else {
					continue
				}
			}
		}


		if (flg == false) 
 		{ message += "- Select a product on offer\n";					submitOK="False"; }


		flg = check_numeric (x.ht_vat); 

		if (flg == false) 
 		{ message += "- Enter a numeric VAT code\n";					submitOK="False"; }


		if (submitOK=="False")
		{ alert(message); return false; }

		if (x.ht_zone.value == "European Union" && x.ht_vat.value == "") {
			flg = confirm ("If you are a non UK retailer within the EU you will be charged VAT if you do not enter your VAT registration number.\nDo you wish to proceed?");
			if (flg == false)									return false; 
		}

 		return true;
	} <!-- end of function -->