// JavaScript Document
function openwindow(wurl,wname,wwidth,wheight)
{
  var width 	  = wwidth;
  var height	  = wheight;
  var url         = wurl;
  var name        = wname;
  var str = "height="+height+",innerHeight="+height+",width="+width+",innerWidth="+width+",scrollbars=yes";
  if(window.screen)
  {
	var xc = 0;
	var yc = 0;
	str += ",left="+xc+",screenX="+ xc+",top="+yc+",screenY="+yc;
  } 
  wwindow=window.open(url, name, str);
}

function sendForm()
{
  var first   = document.newsletter.firstname.value;
  var last    = document.newsletter.lastname.value;
  var email   = document.newsletter.email.value;
  var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
  if(first!=""&&last!=""&&email!=""&&first!="vul in a.u.b."&&last!="vul in a.u.b."&&email!="vul in a.u.b.")
  {
	if(filter.test(email)){document.newsletter.submit();}else{document.newsletter.email.value="ongeldig e-mail adres";}
  }
  else
  {
    if(first==""||first=="vul in a.u.b."){document.newsletter.firstname.value="vul in a.u.b.";};
    if(last==""||last=="vul in a.u.b."){document.newsletter.lastname.value="vul in a.u.b.";};
    if(email==""||email=="vul in a.u.b."){document.newsletter.email.value="vul in a.u.b.";};
  }	
}