<!--
	function checkform(formname,required){
		
		//if(documents.forms[formname].email
		//if(document.forms.formname.email.value)
		var check_flag
		var req_fields = new Array();
		req_fields = required.split(",");
		var strAdress=eval('document.forms.'+ formname + '.email.value');
		if(strAdress.indexOf('@')== -1){
			alert('U heeft een ongeldig email adres ingevuld!');
		 check_flag=0;
		}else{
			check_flag=1;
		}
		
		
		var thisField =0;
		var okField = 0;
		for(i=0;i < req_fields.length;i++){
			var strField=eval('document.forms.'+ formname + '.'+ req_fields[i] +'.value');
			if(strField==""){
				alert('U heeft  het veld: '+ req_fields[i] +'\n niet ingevuld!');
				thisField = 0;
			}	else{
				thisField =1;
			}
			okField =(okField + thisField);
		}
		
		if(eval('document.forms.'+ formname + '.email_1')){
		//Check for typos in email field
		var e 	=	eval('document.forms.'+ formname + '.email.value');
		var e_1 =	eval('document.forms.'+ formname + '.email_1.value');
		var check_email = 0;
		
			if(e != e_1){
				alert('De velden:\n \"email\" en \"email(nogmaals)\"\n komen niet overeen!');
				check_email=0;
			}else{
				check_email=1;
			}
		}
		if(okField == parseInt(req_fields.length) && check_flag==1 && check_email==1){
			
			eval('document.forms.'+ formname + '.submit()');
		}	 
		
	}
	//mega formcheck
//usage: arguments are formname and a pipe-separated array of rewuired fieldnames i.e.
// formCheck('name_of_form','field1|field2|field3');	
	function formCheck(formname,required){
		//put required fields in indexed array
		var req_fields = new Array();
		req_fields = required.split("|");
		
		var turf=0;
		//now check each required field
		for(i=0 ;i < req_fields.length;i++){
			var strField=eval('document.forms.'+ formname + '.'+ req_fields[i] +'.value');
			//Check if email field contains @
			if(req_fields[i]=="email"){
				if(strField.indexOf('@')== -1){
					alert('U heeft een ongeldig email adres ingevuld!');
				}else{
					turf= (turf+1);
				}
			}else{		
			//now check other fields if not empty
					if(strField==""){
						alert('U heeft  het veld: '+ req_fields[i] +'\n niet correct ingevuld!');
					}else{
						turf= (turf+1);
					}
			}
			//alert("veldnaam="+req_fields[i]+"\n turf="+turf +"\n i="+i);
		}
		//Now check if turf equals amount of required fields i.e. each field was valid
		if(turf==req_fields.length){
		 eval('document.forms.'+ formname + '.submit()');
		}else{
		 alert("sorry er ging iets mis \n probeert u het nog eens");
		}
	}

function checkEmail(){
	var e 	=	document.forms[0].email.value;
	var e_1 =	document.forms[0].email_1.value;
	
}
	
function changeWindowSize(width,height){
		if (is.nav4up) {
			Window.outerWidth = (Window.outerWidth + width);
			window.outerHeight = (window.outerHeight + height) ;
		}
	
}	
//Layers
	function showLayer(theLayer) {
		//alert(theLayer);
		if (is.ie4up) document.all[theLayer].style.visibility = 'visible';
		if (is.nav4up) document.layers[theLayer].visibility = 'visible';
	}

	function hideLayer(theLayer) {
		if (is.ie4up) document.all[theLayer].style.visibility = 'hidden';
		if (is.nav4up) document.layers[theLayer].visibility = 'hidden';
	}	
	

function NieuwVenster(a,b,c){
		Win = open(a,b,c);
	}

	function notImpl(){
		alert('sorry, deze functionaliteit is (nog) niet \n geimplementeerd in deze versie');
	}
	
	
// -->