if (document.images)
{
pic1on= new Image(329,46);
pic1on.src="images/btn_wie_ben_ik_over.gif";
pic1off= new Image(329,46);
pic1off.src="images/btn_wie_ben_ik.gif";
pic2on= new Image(329,46);
pic2on.src="images/btn_portfolio_over.gif";
pic2off= new Image(329,46);
pic2off.src="images/btn_portfolio.gif";
pic3on= new Image(329,46);
pic3on.src="images/btn_cv_over.gif";
pic3off= new Image(329,46);
pic3off.src="images/btn_cv.gif";
pic4on= new Image(329,46);
pic4on.src="images/btn_contact_over.gif";
pic4off= new Image(329,46);
pic4off.src="images/btn_contact.gif";

knopje1on= new Image(28,27);
knopje1on.src="images/knopje_wie_ben_ik_over.gif";
knopje1off= new Image(28,27);
knopje1off.src="images/knopje_wie_ben_ik.gif";
knopje2on= new Image(28,27);
knopje2on.src="images/knopje_portfolio_over.gif";
knopje2off= new Image(28,27);
knopje2off.src="images/knopje_portfolio.gif";
knopje3on= new Image(28,27);
knopje3on.src="images/knopje_cv_over.gif";
knopje3off= new Image(28,27);
knopje3off.src="images/knopje_cv.gif";
knopje4on= new Image(28,27);
knopje4on.src="images/knopje_contact_over.gif";
knopje4off= new Image(28,27);
knopje4off.src="images/knopje_contact.gif";
// Wie ben ik
up1on= new Image(15,17);
up1on.src="images/downboven_wie.gif";
up1off= new Image(15,17);
up1off.src="images/upboven.gif";
up2on= new Image(15,17);
up2on.src="images/downonder_wie.gif";
up2off= new Image(15,17);
up2off.src="images/uponder.gif";
// Portfolio
up3on= new Image(15,17);
up3on.src="images/downboven_portfolio.gif";
up3off= new Image(15,17);
up3off.src="images/upboven.gif";
up4on= new Image(15,17);
up4on.src="images/downonder_portfolio.gif";
up4off= new Image(15,17);
up4off.src="images/uponder.gif";
// CV
up5on= new Image(15,17);
up5on.src="images/downboven_cv.gif";
up5off= new Image(15,17);
up5off.src="images/upboven.gif";
up6on= new Image(15,17);
up6on.src="images/downonder_cv.gif";
up6off= new Image(15,17);
up6off.src="images/uponder.gif";
// Contact
up7on= new Image(15,17);
up7on.src="images/downboven_contact.gif";
up7off= new Image(15,17);
up7off.src="images/upboven.gif";
up8on= new Image(15,17);
up8on.src="images/downonder_contact.gif";
up8off= new Image(15,17);
up8off.src="images/uponder.gif";
}

function lightup(imgName)
{
if (document.images)
{
imgOn=eval(imgName + "on.src");
document[imgName].src= imgOn;
}
}

function turnoff(imgName)
{
if (document.images)
{
imgOff=eval(imgName + "off.src");
document[imgName].src= imgOff;
}
}
<!-- Transitional -->

function timeout() {
	document.getElementById('content_sub').style.display = "none";
	setTimeout("hide();", 350);
}
function hide() {
	document.getElementById('flashcontent').style.display = "none";
	document.getElementById('content_sub').style.display = "block";
}

<!-- scroll
function verifyCompatibleBrowser(){ 
    this.ver=navigator.appVersion 
    this.dom=document.getElementById?1:0 
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; 
    this.ie4=(document.all && !this.dom)?1:0; 
    this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
 
    this.ns4=(document.layers && !this.dom)?1:0; 
    this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5) 
    return this 
} 
bw=new verifyCompatibleBrowser() 
 
 
var speed=50 
 
var loop, timer 
 
function ConstructObject(obj,nest){ 
    nest=(!nest) ? '':'document.'+nest+'.' 
    this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0; 
    this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+obj):0; 
    this.scrollHeight=bw.ns4?this.css.document.height:this.el.offsetHeight 
    this.clipHeight=bw.ns4?this.css.clip.height:this.el.offsetHeight 
    this.up=MoveAreaUp;this.down=MoveAreaDown; 
    this.MoveArea=MoveArea; this.x; this.y; 
    this.obj = obj + "Object" 
    eval(this.obj + "=this") 
    return this 
} 
//function MoveArea(x,y){ 
//    this.x=x;this.y=y 
//    this.css.left=this.x 
//    this.css.top=this.y 
//} 
function MoveArea(x,y){ 
    this.x=x;this.y=y 
    this.css.left=this.x + 'px';
    this.css.top=this.y + 'px';
} 
function MoveAreaDown(move){ 
	if(this.y>-this.scrollHeight+objContainer.clipHeight){ 
    this.MoveArea(0,this.y-move) 
    if(loop) setTimeout(this.obj+".down("+move+")",speed) 
	} 
} 
function MoveAreaUp(move){ 
	if(this.y<0){ 
    this.MoveArea(0,this.y-move) 
    if(loop) setTimeout(this.obj+".up("+move+")",speed) 
	} 
} 
 
function PerformScroll(speed){ 
	if(initialised){ 
		loop=true; 
		if(speed>0) objScroller.down(speed) 
		else objScroller.up(speed) 
	} 
} 
 
function CeaseScroll(){ 
    loop=false 
    //if(timer) clearTimeout(timer) 
} 
var initialised; 
function InitialiseScrollableArea(){ 
    objContainer=new ConstructObject('divContainer') 
    objScroller=new ConstructObject('divContent','divContainer') 
    objScroller.MoveArea(0,0) 
    objContainer.css.visibility='visible' 
    initialised=true; 
} 
// end absolutely positioned scrollable area object scripts 

//-->