function preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.p) d.p=new Array();
    var i,j=d.p.length,a=preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.p[j]=new Image; d.p[j++].src=a[i];}}
}

function 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=findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function nbGroup(event, grpName) { //v3.0
  var i,img,nbArr,args=nbGroup.arguments;
  if (event == "init" && args.length > 2) {
    if ((img = findObj(args[2])) != null && !img.init) {
      img.init = true; img.up = args[3]; img.dn = img.src;
      if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
      nbArr[nbArr.length] = img;
      for (i=4; i < args.length-1; i+=2) if ((img = findObj(args[i])) != null) {
        if (!img.up) img.up = img.src;
        img.src = img.dn = args[i+1];
        nbArr[nbArr.length] = img;
    } }
  } else if (event == "over") {
    document.nbOver = nbArr = new Array();
    for (i=1; i < args.length-1; i+=3) if ((img = findObj(args[i])) != null) {
      if (!img.up) img.up = img.src;
      img.src = (img.dn && args[i+2]) ? args[i+2] : args[i+1];
      nbArr[nbArr.length] = img;
    }
  } else if (event == "out" ) {
    for (i=0; i < document.nbOver.length; i++) {
      img = document.nbOver[i]; img.src = (img.dn) ? img.dn : img.up; }
  } else if (event == "down") {
    if ((nbArr = document[grpName]) != null)
      for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.up; img.dn = 0; }
    document[grpName] = nbArr = new Array();
    for (i=2; i < args.length-1; i+=2) if ((img = findObj(args[i])) != null) {
      if (!img.up) img.up = img.src;
      img.src = img.dn = args[i+1];
      nbArr[nbArr.length] = img;
  } }
}

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 MK_dynamicForm() { //v4.0 
  var obj,l,args=MK_dynamicForm.arguments; val=document.MM_returnValue; val=(val==null)?true:val;
  if(val){obj=MM_findObj(args[0]);l=args.length; if(obj){if(l>2){for (i=2; i<(l-1); i+=2)
  {eval("obj."+args[i]+"='"+args[i+1]+"';")}} eval("obj."+args[1]+"();");}}
  document.MM_returnValue = false;
}

function MM_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { 
	
                if ( (val.length != null ) && (val[0].type == 'radio') ) { 
                    for ( j = 0; j < val.length; j++ ) { 
                          if ( (chk = val[j].checked) == true ) { 
                                break; 
                          } 
                    } 
                    if ( chk == false ) 
                         errors += '- '+ val[0].name +'\n'; 
                    continue; 
                } 
	
	
	nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' moet een geldig e-mail adres zijn.\n';
      } else if (test!='R') {
        if (isNaN(val)) errors+='- '+nm+' mag alleen uit nummers bestaan.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (val<min || max<val) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+'.\n'; }
  } if (errors) alert('De volgende verplichte gegevens ontbreken:\n'+errors);
  document.MM_returnValue = (errors == '');
}



function FrontPage_Form1_Validator(theForm)
{

  if (theForm.Naam.value == "")
  {
    alert("Please enter a value for the \"Naam\" field.");
    theForm.Naam.focus();
    return (false);
  }

  if (theForm.Naam.value.length < 1)
  {
    alert("Please enter at least 1 characters in the \"Naam\" field.");
    theForm.Naam.focus();
    return (false);
  }

  if (theForm.Voorletters.value == "")
  {
    alert("Please enter a value for the \"Voorletters\" field.");
    theForm.Voorletters.focus();
    return (false);
  }

  if (theForm.Voorletters.value.length < 1)
  {
    alert("Please enter at least 1 characters in the \"Voorletters\" field.");
    theForm.Voorletters.focus();
    return (false);
  }
  return (true);
}




function doClock(){ // By Paul Davis - www.kaosweaver.com
  var t=new Date(),a=doClock.arguments,str="",i,a1,lang="9";
  var month=new Array('januari','jan','februari','feb','maart','mar','april','apr','mei','mei','juni','jun','juli','jul','augustus','aug' ,'september','sept' ,'oktober','okt' ,'november','nov' ,'december','dec');
  var tday= new Array('zondag','zo','maandag','ma','dinsdag','di','woensdag','wo','donderdag','do','vrijdag','vr','zaterdag','za');
  for(i=0;i<a.length;i++) {a1=a[i].charAt(1);switch (a[i].charAt(0)) {
  case "M":if  ((Number(a1)==3) && ((t.getMonth()+1)<10)) str+="0";
  str+=(Number(a1)>1)?t.getMonth()+1:month[t.getMonth()*2+Number(a1)];break;
  case "D": if ((Number(a1)==1) && (t.getDate()<10)) str+="0";str+=t.getDate();break;
  case "Y": str+=(a1=='0')?t.getFullYear():t.getFullYear().toString().substring(2);break;
  case "W":str+=tday[t.getDay()*2+Number(a1)];break; default: str+=unescape(a[i]);}}return str;
}