// JavaScript Document
	var field1='fout';
	var field2='fout';
	var field3='fout';
	var field4='fout';
	var field5='fout';
	var field6='fout';

	//kijken of de username al in gebruik is.
	var xmlHttp
	function GetXmlHttpObject(){
		var objXMLHttp=null
		if (window.XMLHttpRequest){
			objXMLHttp=new XMLHttpRequest()
		}else if (window.ActiveXObject){
			objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
		} 
		return objXMLHttp
	}
	function CheckUsername(username, veld){
		var fieldImg=document.getElementById(veld.id+'img');
		xmlHttp=GetXmlHttpObject() 
		if (xmlHttp==null){
			return 
		}
		
		var url="actie/usernamecheck.php?username="+username
		xmlHttp.open("GET",url,true)
		xmlHttp.onreadystatechange = function () {
			if (xmlHttp.readyState == 4) {
				if(xmlHttp.responseText == 'beschikbaar'){
					fieldImg.src = 'images/goed.gif';
					field1 = 'goed';
				}else{
					fieldImg.src = 'images/fout.gif';
					field1 = 'fout';
				}
			} 
		}; 
		xmlHttp.send(null);
		checkStatus();
	}

	//wachtwoord check
	function checkWachtwoord(veld){
		var fieldImg=document.getElementById(veld.id+'img');
		var fieldWw=document.getElementById('wachtwoord2');
		var fieldImg2=document.getElementById(fieldWw.id+'img');
		if(veld.value == ""){
			fieldImg.src = 'images/fout.gif';
			field2 = 'fout';
		}else if(veld.value.length <= 5){
			fieldImg.src = 'images/fout.gif';
			field2 = 'fout';
		}else{
			fieldImg.src = 'images/goed.gif';
			field2 = 'goed';
		}
		
		if(veld.value != fieldWw.value){
			fieldImg2.src = 'images/fout.gif';
			field3 = 'fout';
		}else{
			fieldImg2.src = 'images/goed.gif';
			field3 = 'goed';
		}
		checkStatus();
	}
	function checkWachtwoord2(veld){
		var fieldImg=document.getElementById(veld.id+'img');
		var fieldWw=document.getElementById('wachtwoord1');
		if(veld.value != fieldWw.value){
			fieldImg.src = 'images/fout.gif';
			field3 = 'fout';
		}else{
			fieldImg.src = 'images/goed.gif';
			field3 = 'goed';
		}
		checkStatus();
	}
	// kijken of een veld is ingevuld
	function checkFillIn(veld){
		var fieldImg=document.getElementById(veld.id+'img');
		if(veld.value == ""){
			fieldImg.src = 'images/fout.gif';
			if(veld.id == 'naam'){
				field4 = 'fout';
			}else{
				field5 = 'fout';
			}
		}else{
			fieldImg.src = 'images/goed.gif';
			if(veld.id == 'naam'){
				field4 = 'goed';
			}else{
				field5 = 'goed';
			}
		}
		checkStatus();
	}
	//controlle e-mail adress
	function checkEmail(veld){
		var fieldImg=document.getElementById(veld.id+'img');
		var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if (!filter.test(veld.value)) {
			fieldImg.src = 'images/fout.gif';
			field6 = 'fout';
		}else{
			fieldImg.src = 'images/goed.gif';
			field6 = 'goed';
		}
		checkStatus();
	}
	
	function checkStatus(){
		var button=document.getElementById('submit');
	}