function hoogte() {
	h = document.body.clientHeight - 176;
	document.getElementById('bol1').style.height = h;
	document.getElementById('bol2').style.height = h;
	document.getElementById('bol3').style.height = h;
	document.getElementById('bol4').style.height = h;
}

function pi() { 
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=pi.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function ir() { 
  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 fo(n) { 
  var p,i,x; 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=fo(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function si(obj, id){
	obj.src = "gfx/"+id+".gif";
}

function os(id) {
	sh('l_'+id);
	sh('r_'+id);
	if (id!=lid){
		sh('l_'+lid);
		sh('r_'+lid);
		lid = id;
	}else{
		lid = 0;
	}
}

function sh(id) {
	e = document.getElementById(id);
  	if (e) { 
		e.style.display = ((e.style.display == 'block')?'none' :'block');
	}
}
function sl(obn, txt) {
  if ((obj=fo(obn))!=null) with (obj)
    if (document.layers) {document.write(unescape(txt)); document.close();}
    else innerHTML = unescape(txt);
}

function rand(f,t){
	return(Math.round(Math.random()*t))+f;
}

function ow(fnm){
	cnt = window.open('image.php?fnm='+fnm,'','left=0,top=0,screenX=0,screenY=0,width=600,height=400,toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes');
	cnt.focus();
}

function owd(fnm, w, h){
	cnt = window.open(fnm,'','left=100,top=100,screenX=100,screenY=100,width='+(w+10)+',height='+(h+10)+',toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes');
	cnt.focus();
}

function openSite(URLStr)
{
    var maxx = screen.width;
    var maxy = screen.height;
    windowprops = "toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,width=100,height=100,left=100,top=100";
    window.open(URLStr+"&maxx="+maxx+"&maxy="+maxy,"",windowprops);
}

function gs(id) {
	if(de){return document.getElementById(id).style;} else if(da) {return document.all[id].style;} else {		return document[id];}
}

function MM_findObj(n, d) { //v4.01
  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 && d.getElementById) x=d.getElementById(n); return x;
}

function MM_validateForm_nl() { //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) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
  } if (errors) alert('The following error(s) occurred:\n'+errors);
  document.MM_returnValue = (errors == '');
}


de = document.getElementById;
da = document.all;
lid = 0;