function formCheck(formobj){

			
	//Schrijf variable weg voor het veld _verplicht
	var obj = formobj.elements;
	var velden = new Array()
	var velden_tekst = new Array()

	//Loop door alle velden en maak er arrays voor de fieldcheck
	for(i=0; i<obj.length; i++)
      if (obj[i].name.indexOf('verplicht_')!= -1)
       {
       	velden[i] = obj[i].name
       	velden_tekst[i] = obj[i].name.replace(/verplicht_/, "")
       }  

	// Enter name of mandatory fields
	var fieldRequired = velden;
	// Enter field description to appear in the dialog box
	var fieldDescription = velden_tekst;
	
	
	// dialog message
	var alertMsg = "U dient de volgende velden aan te vullen:\n";
	
	var l_Msg = alertMsg.length;
	
	for (var i = 0; i < fieldRequired.length; i++){
		var obj = formobj.elements[fieldRequired[i]];
		if (obj){
			switch(obj.type){
			case "select-one":
				if (obj.selectedIndex == -1 || obj.options[obj.selectedIndex].text == ""){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			case "select-multiple":
				if (obj.selectedIndex == -1){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			case "text":
			case "textarea":
				if (obj.value == "" || obj.value == null){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
				break;
			default:
			}
			if (obj.type == undefined){
				var blnchecked = false;
				for (var j = 0; j < obj.length; j++){
					if (obj[j].checked){
						blnchecked = true;
					}
				}
				if (!blnchecked){
					alertMsg += " - " + fieldDescription[i] + "\n";
				}
			}
		}
	}

	if (alertMsg.length == l_Msg){
		//Schrijf in de get mee welk formulier het is
		formobj.action = formobj.action + '&FormID=' + formobj.name;
		return true;
	}else{
		alert(alertMsg);
		return false;
	}
}
// -->