// Javascripts

				function checkFields(f) {

					if(f.email.value == "") {
						alert("Sorry, maar u vergeet uw emailadres in te vullen");
						return false;
					}
					if(validate_email(f.email.value)) {
						f.submit();
					}
				}

				function validate_email(str) {
					var at="@"
					var dot="."
					var lat=str.indexOf(at)
					var lstr=str.length
					var ldot=str.indexOf(dot)
					if (str.indexOf(at)==-1){
						alert("Sorry, geen geldig emailadres");
						return false;
					}

					if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
						alert("Sorry, geen geldig emailadres");
						return false;
					}

					if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
						 alert("Sorry, geen geldig emailadres");
						 return false;
					}

					 if (str.indexOf(at,(lat+1))!=-1){
						 alert("Sorry, geen geldig emailadres");
						 return false;
					 }

					 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
						 alert("Sorry, geen geldig emailadres");
						 return false;
					 }

					 if (str.indexOf(dot,(lat+2))==-1){
						 alert("Sorry, geen geldig emailadres");
						 return false;
					 }

					 if (str.indexOf(" ")!=-1){
						 alert("Sorry, geen geldig emailadres");
						 return false;
					 }

					 return true
				}

function searchboxFocus (id, txt, def) {
  el = document.getElementById(id);
  if(el!=null) {
    if (el.value=="" || el.value==def) {
      el.value=txt;
    }
  }
}

function getElement(id) {
var elem;
if (document.getElementById) { // standard browsers
elem = document.getElementById(id);
} else if (document.all) { // IE 4
elem = document.all[id];
}
return elem;
}

function ShowPopup(id,event) {
  var elem = getElement(id);
  var elemStyle = elem.style || elem;
  var width = elem.offsetWidth || elem.width || 100; // default to 100
  var height = elem.offsetHeight || elem.height || 100;
  var posX,posY;

  if (event.pageX) { // NS 4, Mozilla
    posX = event.pageX;
    posY = event.pageY;
  } else { // IE, Opera
    var root = document.documentElement || document.body;
    posX = event.clientX + root.scrollLeft;
    posY = event.clientY + root.scrollTop;
  }

  elemStyle.top = posY - height + "px";
  elemStyle.left = posX - width + "px";
  elemStyle.visibility = "visible";

}

function HidePopup(id) {
  var elem = getElement(id);
  var elemStyle = elem.style || elem;
  elemStyle.visibility = "hidden";
}