var isIE  = (document.all) ? true : false;
var isDom = (document.getElementById) ? true : false;
var isNS4 = (document.layers) ? true : false;
var isIE4 = (isIE && !isDom) ? true : false;
var isIE5 = (isIE && isDom) ? true : false;
var isNS6 = (!isIE && isDom) ? true : false;

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		home_over = newImage("gfx/home_over.gif");
		bio_over = newImage("gfx/bio_over.gif");
		tourdates_over = newImage("gfx/tourdates_over.gif");
		reviews_over = newImage("gfx/reviews_over.gif");
		media_over = newImage("gfx/media_over.gif");
		discography_over = newImage("gfx/discography_over.gif");
		photos_over = newImage("gfx/photos_over.gif");
		talk_over = newImage("gfx/talk_over.gif");
		linkjes_over = newImage("gfx/linkjes_over.gif");
		contact_over = newImage("gfx/contact_over.gif");		
		terug_over = newImage("gfx/terug_over.gif");
		verder_over = newImage("gfx/verder_over.gif");		
		enter_over = newImage("gfx/enter_over.gif");		
		preloadFlag = true;
	}
}


function Opensite(pad,naam,breed,hoog) {
        mysite = window.open(pad, naam, "width=" + breed + ",height=" + hoog + ",toolbar=no,location=no,directories=no,status=0,resizable=no,scrollbars=no,menubar=no");
		mysite.moveTo(((screen.width/2)-(breed/2)),((screen.height/2)-(hoog/2)));
}


function OpenVenster(pad,naam,breed,hoog) {
        NieuwVenster = window.open(pad, naam, "width=" + breed + ",height=" + hoog + ",toolbar=no,location=no,directories=no,status=0,resizable=yes,scrollbars=yes,menubar=no");
		NieuwVenster.moveTo(((screen.width/2)-(breed/2)),((screen.height/2)-(hoog/2)));
}


function getStyleObject(objectId) {
    if(document.getElementById && document.getElementById(objectId)) {
		return document.getElementById(objectId).style;			// voor W3C DOM
    } else if (document.all && document.all(objectId)) {
		return document.all(objectId).style;								// voor IE4 DOM
    } else if (document.layers && document.layers[objectId]) {
		return document.layers[objectId];									// voor N4 DOM
    } else {
		return false;																	// geen van allen
	}
}