function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 0;

	//determine the direction for the blending, if start and end are the same nothing happens
	if(opacStart > opacEnd) {
		for(i = opacStart; i >= opacEnd; i--) {
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	} else if(opacStart < opacEnd) {
		for(i = opacStart; i <= opacEnd; i++)
			{
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	}
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
	var object = document.getElementById(id).style; 
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	//set the current image as background
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).src = imagefile;

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}

function websitesLabels(id) {
	
	opacity('foto1', 0, 100, 2000);
	opacity('blok1', 0, 100, 2000);
	setTimeout('opacity("foto2", 0, 100, 2000)', 500);
	setTimeout('opacity("blok2", 0, 100, 2000)', 500);
	setTimeout('opacity("foto3", 0, 100, 2000)', 1000);
	setTimeout('opacity("blok3", 0, 100, 2000)', 1000);
	setTimeout('opacity("foto4", 0, 100, 2000)', 1500);
	setTimeout('opacity("blok4", 0, 100, 2000)', 1500);
	setTimeout('opacity("foto5", 0, 100, 2000)', 2000);
	setTimeout('opacity("blok5", 0, 100, 2000)', 2000);
	if (id == 1) {
	setTimeout('MM_swapImage("blok1","","../images/website-over1.gif",1)',3000);
	} else if (id == 2) {
	setTimeout('MM_swapImage("blok1","","../images/website-over2.gif",1)',3000);
	} else if (id == 3) {
	setTimeout('MM_swapImage("blok1","","../images/website-over3.gif",1)',3000);
	} else if (id == 4) {
	setTimeout('MM_swapImage("blok1","","../images/website-over4.gif",1)',3000);
	} else if (id == 5) {
	setTimeout('MM_swapImage("blok1","","../images/website-over5.gif",1)',3000);
	} else {
	setTimeout('MM_swapImage("blok1","","../images/website-vast.gif",1)',3000);
	}
	setTimeout('toggleAan("fotogroot1")', 3000);
	//setTimeout('MM_swapImage("blok1","","../images/website-vast.gif",1)',5000);
	//setTimeout('toggleUit("fotogroot1")', 5000);
}

function websites() {
	
	opacity('foto1', 0, 100, 2000);
	opacity('blok1', 0, 100, 2000);
	setTimeout('opacity("foto2", 0, 100, 2000)', 500);
	setTimeout('opacity("blok2", 0, 100, 2000)', 500);
	setTimeout('opacity("foto3", 0, 100, 2000)', 1000);
	setTimeout('opacity("blok3", 0, 100, 2000)', 1000);
	setTimeout('opacity("foto4", 0, 100, 2000)', 1500);
	setTimeout('opacity("blok4", 0, 100, 2000)', 1500);
	setTimeout('opacity("foto5", 0, 100, 2000)', 2000);
	setTimeout('opacity("blok5", 0, 100, 2000)', 2000);
	setTimeout('MM_swapImage("blok1","","images/website-over.gif",1)',3000);
	setTimeout('toggleAan("Website1")', 3000);
	//setTimeout('MM_swapImage("blok1","","images/website-vast.gif",1)',5000);
	//setTimeout('toggleUit("Website1")', 5000);
}

function fotos() {
	
	opacity('foto1', 0, 100, 2000);
	opacity('blok1', 0, 100, 2000);
	setTimeout('opacity("foto2", 0, 100, 2000)', 500);
	setTimeout('opacity("blok2", 0, 100, 2000)', 500);
	setTimeout('opacity("foto3", 0, 100, 2000)', 1000);
	setTimeout('opacity("blok3", 0, 100, 2000)', 1000);
	//setTimeout('MM_swapImage("blok1","","images/website-over.gif",1)',3000);
	//setTimeout('toggleAan("Website1")', 3000);
	//setTimeout('MM_swapImage("blok1","","images/website-vast.gif",1)',5000);
	//setTimeout('toggleUit("Website1")', 5000);
}

function fadeIn() {
	
	opacity('image', 0, 100, 2000);
}