var actieitems = 0;
var itemnr = 0;
var opacity = 100;
var opacitychange = -6;
var changeelement;
var intervalID;

function StartFader(){
	if(actieitems > 1){
		itemnr = 1;
		changeelement = document.getElementById("menuimage");
	    window.setTimeout("intervalID = window.setInterval(\"Fader()\", 60);", 2000);
	}
}

function Fader() {
	opacity += opacitychange;
	setOpacity(changeelement, opacity);
	if (opacity >= 100){
		window.clearInterval(intervalID);
		opacitychange = opacitychange * -1;
		window.setTimeout("intervalID = window.setInterval(\"Fader()\", 100);", 2000);
	} else if (opacity <= 0 ){
		window.clearInterval(intervalID);
		document.getElementById("menuimage"+itemnr).style.display = "none";
		itemnr++;
		if( itemnr > actieitems){
			itemnr = 1;
		}
		document.getElementById("menuimage"+itemnr).style.display = "inline";
		opacitychange = opacitychange * -1;
		intervalID = window.setInterval("Fader()", 100);
	}
}

function setOpacity(obj, opacity) {
     opacity = (opacity == 100)?99.999:opacity;

    //IE/Win
    //obj.style.filter = "alpha(opacity:"+opacity+")";
    obj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=0,opacity:"+opacity+")";

    // Safari<1.2, Konqueror
    obj.style.KHTMLOpacity = opacity/100;

    // Older Mozilla and Firefox
    obj.style.MozOpacity = opacity/100;

    // Safari 1.2, newer Firefox and Mozilla, CSS3
     obj.style.opacity = opacity/100;
}