// JavaScript Document


function gelijkeHoogte() {
	// hoogte gelijk maken van het menu + content
	x = document.getElementById('content_rechts');
	y = document.getElementById('submenu');
	if (x.offsetHeight > y.offsetHeight) {
		y.style.height = x.offsetHeight + 'px';
		extra = x.offsetHeight;
	}
	else {
		x.style.height = y.offsetHeight + 'px';
		extra = y.offsetHeight;
	}	
}

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_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function P7_Snap() { //v2.67 by PVII
 var g,x,y,ox,bx,oy,p,tx,a,b,k,d,da,e,el,tw,q0,xx,yy,w1,pa='px',args=P7_Snap.arguments;a=parseInt(a);
 if(document.layers||window.opera){pa='';}for(k=0;k<(args.length);k+=4){
 if((g=MM_findObj(args[k]))!=null){if((el=MM_findObj(args[k+1]))!=null){
 a=parseInt(args[k+2]);b=parseInt(args[k+3]);x=0;y=0;ox=0;oy=0;p="";tx=1;
 da="document.all['"+args[k]+"']";if(document.getElementById){
 d="document.getElementsByName('"+args[k]+"')[0]";if(!eval(d)){
 d="document.getElementById('"+args[k]+"')";if(!eval(d)){d=da;}}
 }else if(document.all){d=da;}if(document.all||document.getElementById){while(tx==1){
 p+=".offsetParent";if(eval(d+p)){x+=parseInt(eval(d+p+".offsetLeft"));y+=parseInt(eval(d+p+".offsetTop"));
 }else{tx=0;}}ox=parseInt(g.offsetLeft);oy=parseInt(g.offsetTop);tw=x+ox+y+oy;
 if(tw==0||(navigator.appVersion.indexOf("MSIE 4")>-1&&navigator.appVersion.indexOf("Mac")>-1)){
  ox=0;oy=0;if(g.style.left){x=parseInt(g.style.left);y=parseInt(g.style.top);}else{
  w1=parseInt(el.style.width);bx=(a<0)?-5-w1:-10;a=(Math.abs(a)<1000)?0:a;b=(Math.abs(b)<1000)?0:b;
  x=document.body.scrollLeft+event.clientX+bx;y=document.body.scrollTop+event.clientY;}}
 }else if(document.layers){x=g.x;y=g.y;q0=document.layers,dd="";for(var s=0;s<q0.length;s++){
  dd='document.'+q0[s].name;if(eval(dd+'.document.'+args[k])){x+=eval(dd+'.left');y+=eval(dd+'.top');
  break;}}}e=(document.layers)?el:el.style;xx=parseInt(x+ox+a),yy=parseInt(y+oy+b);
 if(navigator.appVersion.indexOf("MSIE 5")>-1 && navigator.appVersion.indexOf("Mac")>-1){
  xx+=parseInt(document.body.leftMargin);yy+=parseInt(document.body.topMargin);}
 e.left=xx+pa;e.top=yy+pa;}}}
}

function P7_MultiClass2() { //v1.0 by PVII
 var args=P7_MultiClass2.arguments;if(document.getElementById){
  for(var i=0;i<args.length;i+=2){if(document.getElementById(args[i])!=null){
  if(document.p7setdown){for(var k=0;k<p7dco.length-1;k+=2){
  if(args[i]==p7dco[k]){args[i+1]=p7dco[k+1];break;}}}
  document.getElementById(args[i]).className=args[i+1];}}
  }
}

var current 	= '';
var currentname 	= '';
var subcurrent 	= '';
var lnkcurrent 	= '';
var menuclick 	= 0;
var previoussub = '';

document.onclick = function(){
	if(menuclick==0){
		hideSub(current);
	}
	menuclick = 0;
}
function hideSub(id){
	if(current!=''){
		MM_showHideLayers(id,'', 'hidden');
	}
	if(subcurrent!=''){
		lnk = document.getElementById(lnkcurrent);
		MM_showHideLayers(subcurrent,'', 'hidden');
		subcurrent = '';
	}
	P7_MultiClass2(currentname,'topmenu');
	return false;
}

function showSub(id, name) {
	menuclick = 0;
	
	if(current!=id && current!=''){
		hideSub(current);
	}
	current = id;
	currentname = name;
	div = document.getElementById(id);
	if(div.style.visibility == 'hidden'){
		MM_showHideLayers(id,'', 'visible');
	} 
	P7_MultiClass2(currentname,'topmenuover');
	return false;
}

function showSchool(id) {
	MM_showHideLayers(id,'','show');
	MM_showHideLayers('content_rechts','','hide');
}

function hideSchool(id) {
	MM_showHideLayers(id,'','hide');
	MM_showHideLayers('content_rechts','','show');
}

function showSchools(id)
{
	for (var i = 0; i < arrScholen.length; i++)
	{
		hideSchool('school' + arrScholen[i])
	}
	showSchool(id)
}

function hideSchools(id)
{
	for (var i = 0; i < arrScholen.length; i++)
	{
		hideSchool('school' + arrScholen[i])
	}
	hideSchool(id)
}


function snapBalken(pagina) { // voor als je 't snapt!
	var br, ho, rv, x, y, z;
	if (document.documentElement && document.documentElement.clientWidth){br = document.documentElement.clientWidth;}
	else if (document.body){br = document.body.clientWidth;}
	else if (window.innerWidth) {br = window.innerWidth;}
	
	if (document.documentElement && document.documentElement.clientHeight){ho = document.documentElement.clientHeight;}
	else if (document.body){ho = document.body.clientHeight;}
	else if (window.innerHeight) {ho = window.innerHeight;}
	
	rv = (br - 955) / 2;
	if (rv > 0) {
		x = document.getElementById('rechtervlak');
		x.style.width = rv + 'px';
		
		x = document.getElementById('linkervlak');
		x.style.width = (rv + 204) + 'px';
	}
	P7_Snap('container','rechtervlak',955,0);
	x = document.getElementById('content_rechts');
	y = document.getElementById('linkerkolom');
	if (x.offsetHeight > y.offsetHeight) {
		if (pagina == 0) {
			y.style.height = x.offsetHeight + 'px';	
		}
		extra = x.offsetHeight;
	}
	else {
		if (pagina == 0) {
			x.style.height = y.offsetHeight + 'px';	
		}
		extra = y.offsetHeight;
	}	
	z = document.getElementById('overlay');
		
	x = document.getElementById('spacing');	
	if (ho > (52 + z.offsetHeight + 80 + extra)) {
		if ((ho - (52 + z.offsetHeight + 80 + extra) - 16) > 0) {
			x.style.height = (ho - (52 + z.offsetHeight + 80 + extra) - 16) + 'px';
		}
		else {
			x.style.height = 0+'px';
		}
	}
	if (pagina == 0) {
		snapSchool();
	}
	P7_Snap('footer','linkervlak',-rv,-24);

}