var checkArray = new Array();		 
	checkArray["naam"] = {"msg": "U dient uw voorletters aan te geven",
                     "reqValue": "",
                     "reqControlName":""};
	checkArray["email"] = {"msg": "U dient uw achternaam aan te geven",
                     "reqValue": "",
                     "reqControlName":""};
	checkArray["adres"] = {"msg": "U dient uw adres aan te geven",
                     "reqValue": "",
                     "reqControlName":""};
	checkArray["postcode"] = {"msg": "U dient uw postcode aan te geven",
                     "reqValue": "",
                     "reqControlName":""};
	checkArray["plaats"] = {"msg": "U dient uw woonplaats aan te geven",
                     "reqValue": "",
                     "reqControlName":""};
	checkArray["telefoon"] = {"msg": "U dient uw telefoonnummer aan te geven",
                     "reqValue": "",
                     "reqControlName":""};
	checkArray["email_from"] = {"msg": "U dient uw email adres aan te geven",
                     "reqValue": "",
                     "reqControlName":""};



	function checkForm2(formulier)
	{
		for(var i in checkArray)
		{
			var element = eval('document.'+formulier+'.'+i);
			if(checkArray[i]["reqControlName"]!="")
			{
				var reqElement = eval("document."+formulier+"."+checkArray[i]["reqControlName"]);
				//alert(reqElement[0].value+' '+checkArray[i]["reqValue"]);
				if(reqElement.value==checkArray[i]["reqValue"])
				{
					alert(checkArray[i]["msg"]);
					reqElement.focus();
					return false;
				}
				else
				{
					continue;
				}
			}
			if(element.type=='select-one')
			{
				if(element.selectedIndex==0)
				{
					element.focus();
					alert(checkArray[i]["msg"]);
					return false;
				}
			}
			if(element.type=='text')
			{
				if(element.value=='')
				{
					element.focus();
					alert(checkArray[i]["msg"]);
					return false;
				}
			}

		}
		return true;
	}

	function checkForm(formulier)
	{
		if(checkForm2(formulier))
			eval("document."+formulier+".submit()");
	}

	function checkZoekNummer(formulier)
	{
		submit = true;
		if(formulier.artnr.value!="" && formulier.artnr.value=="Article Number")
		{
			alert('you need to insert an article number.');
			formulier.artnr.focus();
			submit=false;
		}
		
		if(submit)
		{	
			formulier.submit();
		}
	}

	function checkZoekTowbarType(formulier)
	{
		if(formulier.brandid.selectedIndex!=0 && formulier.towbartypeid.selectedIndex==0)
		{
			alert('U dient ook de type trekhaak te selecteren.');
			return false;
		}

		formulier.submit();
	}