var bugRiddenCrashPronePieceOfJunk = ((navigator.userAgent.indexOf('MSIE 5.2') != -1 || navigator.userAgent.indexOf('MSIE 5.1') != -1)	&&	navigator.userAgent.indexOf('Mac') != -1);

if (bugRiddenCrashPronePieceOfJunk == 1)
{
	alert('You are using Internet Explorer 5.1 or 5.2 on a Mac. You will probably not be able to optimally use this website (AND a lot of other websites) with this browser. Use Safari of Firefox (http://www.mozilla.com/firefox/) instead. It will make you happier!');

}

function alGeladen() {
	if (document.getElementById('container'))  {
		getElementWidth('container');	
	} else {
		setTimeout('alGeladen()',500);
		setTimeout('imgRotateStart()',500)
	}
}
function ookalGeladen(){
	if (document.getElementById('doet'))  {
		setTimeout('textRotate()',2000);
	} else {
		setTimeout('ookalGeladen()',500);
	}
}

	alGeladen();
	ookalGeladen();

function getElementWidth(Elem) {
	
	if(document.getElementById) {
		var elem = document.getElementById(Elem);
		var elemtoset = document.getElementById('header');		
	} else if (document.all){
		var elem = document.all[Elem];
		var elemtoset = document.all['header'];
	}
		xPos = elem.clientWidth;
		xPosscroll = elem.offsetWidth;
		
		if (window.XMLHttpRequest) {
		// IE 7, mozilla, safari, opera 9
			elemtoset.style.width = xPos+"px";
		} else {
		// IE6, older browsers
		elemtoset.style.width = xPosscroll+"px";	
		}
		
		
		//if (document.all) {
		//	elemtoset.style.width = xPosscroll+"px";			
		//} else if(document.getElementById) {
			//elemtoset.style.width = xPos+"px";
	//}
	
	} 

function rijOmhoog(actie,rij) {
	if(document.getElementById) {
		var rijnaam = document.getElementById(rij);
		var nav = "nav"+rij;
		var navnaam = document.getElementById(nav);
		
	} else if (document.all){
		var rijnaam = document.all[rij];
		var nav = "nav"+rij;
		var navnaam = document.all[nav];
	}
		//if (document.all) {
			if (actie == "hoog"){
				rijnaam.className = "kolomhover";
				navnaam.className = "navkolomhover";
			} else {
					rijnaam.className = "kolom";
					navnaam.className = "navkolom";
			}
		//} else {
		//	if (actie == "hoog"){
			//	rijnaam.className = "kolomhover";
			//	navnaam.className = "navkolomhover";				
			//} else  {
			//	rijnaam.className = "kolom";
			//	navnaam.className = "navkolom";		
			//}
		//}
	}
function rijenOmlaag(){
		document.getElementById('kol1').className = "kolom";
		document.getElementById('kol2').className = "kolom";
		document.getElementById('kol3').className = "kolom";
		document.getElementById('kol4').className = "kolom";
		document.getElementById('kol5').className = "kolom";
		document.getElementById('kol6').className = "kolom";
		document.getElementById('kol7').className = "kolom";
	}
	
function rand_number(n)
{
	var x;
	x=Math.round(Math.random()*100);
	x%=n;
	return x;
}

function textRotate()
{
	var i;
	var interval=3000; <!-- interval: 5000 = 5 seconds -->
	var txt = new Array();
	
	txt[0]='ontwerpt';
	txt[1]='maakt';
	txt[2]='kookt';
	txt[3]='geeft vorm';
	txt[4]='bouwt';
	txt[5]='praat';
	txt[6]='bedenkt';
	txt[7]='denkt mee';
	txt[8]='regelt';
	txt[9]='organiseert';
	txt[10]='cre&euml;ert';
	txt[11]='verbindt';

	var totaal_txt = 12; 
	var i=rand_number(totaal_txt); 
	document.getElementById('doet').innerHTML=txt[i];
	setTimeout("textRotate()",interval);
	
}

function preloadImage(myImg) {
	var laadPlaatje = new Image();
	laadPlaatje.onload = function() {
		setTimeout('setImg("'+myImg+'")',20000);
		}
	laadPlaatje.src = "images/"+myImg+".jpg";
}

function imgRotate()
{
	var j;
	var totaal_img = 58;
	var j=rand_number(totaal_img); 
	var ditImg = 'bckgr'+[j];
	preloadImage(ditImg);
}
function imgRotateStart()
{
	var k;
	var totaal_img = 59;
	var k=rand_number(totaal_img); 
	var ditImg = 'bckgr'+[k];
	document.getElementById('body').style.backgroundImage = 'url(images/'+ditImg+'.jpg)';
	imgRotate();
}
function setImg(loadedImg){
	document.getElementById('body').style.backgroundImage = 'url(images/'+loadedImg+'.jpg)';
	imgRotate();
	}

function showContent() {
	document.getElementById('overlaag').style.marginLeft="0px";
	var emheight = document.getElementById('container').scrollTop;
	var scrollheight = document.getElementById('kol1').offsetTop;
	var optellen = emheight+scrollheight;
		var x,y;
			if (self.innerHeight) // all except Explorer
			{
				x = self.innerWidth;
				y = self.innerHeight;
			}
			else if (document.documentElement && document.documentElement.clientHeight)
				// Explorer 6 Strict Mode
			{
				x = document.documentElement.clientWidth;
				y = document.documentElement.clientHeight;
			}
			else if (document.body) // other Explorers
			{
				x = document.body.clientWidth;
				y = document.body.clientHeight;
			}
			if (y > 520) {
				document.getElementById('overlaag').style.top = "50%";
				document.getElementById('overlaag').style.marginTop = "-260px";
			
			} else {
				document.getElementById('overlaag').style.top = "5px";
				document.getElementById('overlaag').style.height = y - 10+"px";
				
			}
	//document.getElementById('overlaag').style.top = optellen+10+"px";
	//document.getElementById('overlaag').style.top = "5%";
	
	// setTimeout('alGeladen()',500);
	}
function hideContent() {
	document.getElementById('overlaag').style.marginLeft="-9000px";
	// setTimeout('alGeladen()',500);
	}
function MM_goToURL() { //v3.0
  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}