window.onload = rolloverInit;

function rolloverInit() {
	var bild = new Image;
	bild = document.getElementById("roding");
	setupRollover(bild);
}
			  
function setupRollover(thisImage) { 
	thisImage.outImage = new Image();
	thisImage.outImage.src = thisImage.src;
	thisImage.onmouseout = rollOut;
	
	thisImage.overImage = new Image();
	thisImage.overImage.src = "_bilder/roding.jpg";
	thisImage.onmouseover = rollOver;
}

function rollOut() {
	this.src = this.outImage.src;
}

function rollOver() {
	this.src = this.overImage.src;
}