var activeBut='home';

var codePresent=true;
buttonNames = new Array("home","biography","music","pictures","contact","links","guestbook");

var agt=navigator.userAgent.toLowerCase();
if (agt.indexOf("msie")!=-1 && agt.indexOf("mac")!=-1){
alert ('Uw browser is niet geschikt om deze site goed weer te geven');
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.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 MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr;
  for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++){
  if (x.src.indexOf(activeBut)==-1){
	 x.src=x.oSrc;
	 }
	}
}


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_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_goToURL() {
	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]+"'");
  	}
}


function setButtonIns(highlight,caller){
	window.activeBut=highlight;
	// check button existence
if (document[highlight] && caller !='flash'){
	// reset all buttons
	for (i=0; i<buttonNames.length; i++){
		MM_swapImage(buttonNames[i],'','images/nav/bt_'+buttonNames[i]+'.gif',1);
	}
	if (highlight!='' && highlight != undefined){
		MM_swapImage(highlight,'','images/nav/bt_'+highlight+'_o.gif',1);
		imageName='images/titel_'+highlight+'.gif';
		top.document['kop'].src=imageName;
	} 
} else if (caller =='flash'){
	for (i=0; i<buttonNames.length; i++){
		MM_swapImage(buttonNames[i],'','images/nav/bt_'+buttonNames[i]+'.gif',1);
	}
		imageName='images/titel_'+highlight+'.gif';
		top.document['kop'].src=imageName;
	}
}

function changePage(pageName){
	pagePath='../programma/'+pageName+'.php';
	setButtonIns(pageName,'flash');
	MM_goToURL('parent.frames[\'contentframe\']',pagePath);	
}