function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}
window.onload = externalLinks;

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		startKnop_over = newImage("images/startKnop-over.jpg");
		preloadFlag = true;
	}
}


function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

	goods='0123456789'

	function getkey(e)
	{
	if (window.event)
		return window.event.keyCode;
	else if (e)
   		return e.which;
	else
  	 	return null;
	}

	function goodchars(e)
	{
		var key, keychar;
		key = getkey(e);
		if (key == null) return true;
		keychar = String.fromCharCode(key);
		keychar = keychar.toLowerCase();
		goods = goods.toLowerCase();
		if (goods.indexOf(keychar) != -1)
			return true;
		if ( key==null || key==0 || key==8 || key==9 || key==13 || key==27 )
		return true;
		return false;
	}

function valideren()
{
	if(document.contact.bedrijf.value=='')
	{
		alert('Gelieve uw bedrijf in te vullen.');
		document.contact.bedrijf.focus();
		return false
	}
	else if(document.contact.voornaam.value=='')
	{
		alert('Gelieve uw voornaam in te vullen.');
		document.contact.voornaam.focus();
		return false
	}
	else if(document.contact.naam.value=='')
	{
		alert('Gelieve uw naam in te vullen.');
		document.contact.naam.focus();
		return false
	}
	else if(document.contact.email.value=='')
	{
		alert('Gelieve uw e-mailadres in te vullen.');
		document.contact.email.focus();
		return false
	}
	else if(document.contact.tel.value=='')
	{
		alert('Gelieve uw telefoon in te vullen.');
		document.contact.tel.focus();
		return false
	}
	else if(document.contact.comment.value=='')
	{
		alert('Gelieve uw commentaar, vragen, ... in te vullen.');
		document.contact.comment.focus();
		return false
	}
	else if(document.contact.strCAPTCHA.value=='')
	{
		alert('Gelieve de CAPTCHA code in te vullen.');
		document.contact.strCAPTCHA.focus();
		return false
	}
	else
	{
		document.contact.submit();
	}
}