function pop(img, width, height) {

  var screenW = 800;
  var screenH = 600;
  if (document.all || document.layers) {
    var screenW = screen.availWidth;
    var screenH = screen.availHeight;
  }

  var url = 'showimg.php?img='+img;
  var popW = width + 40;
  var popH = height + 60;

  var leftPos = (screenW-popW)/2;
  var topPos = (screenH-popH)/2;

  var vars = 'toolbar=no,directories=no,menubar=no,resizable=yes,status=no,maximize=no,location=no,scrollbars=no,width='+popW+',height='+popH+',screenX='+leftPos+',screenY='+topPos+',left='+leftPos+',top='+topPos;
  w = window.open(url,'',vars);

  w.focus();

  return false;
}

  function CodeM(a,b){
  	var at = "@";
  	this.location.href="mailto:"+a+at+b;
  	return false;
  }

  function CodeMail(u,d,label){
  	var at = "<img name=\""+u+d+"at"+"\"  src=\"images/at.gif\" border=\"0\" />";
  	document.write("<a onclick=\"return CodeM('"+u+"','"+d+"');\" href=\"#\">"+label+"</a>");

  }

  //flip at symbool
  //o = object
  //r = richting (up, down)
  function flip(id,r){
  	var naam = id+'at';
  	var o = document.getElementById(naam);

  	if (r=="down" && o){
  		o.src = 'images/at_h.gif'
  	}
  	else if (r=="up" && o){
  		o.src = 'images/at.gif';
  	}
  	return true;
  }

function openWindowTechnetLid(id) {
	url = 'edittechnetlid.php?ac=wijzigen&id='+id;

	if (url.length>0) {
		var popW = 780;
		var popH = 500;
		var leftPos = (screen.width) ? (screen.width-popW)/2 : 0;
		var topPos = (screen.height) ? (screen.height-popH)/2 : 0;
		var features = 'location=no,toolbar=no,directories=no,menubar=no,scrollbars=yes,resizable=yes,width='+popW+',height='+popH+',left='+leftPos+',top='+topPos;
		w = window.open(url, '', features);
		w.focus();
	}

	return false;
}