function randomTopImage() {
	var topImages = new Array();
	topImages[0] = 'fileadmin/template/uss_dk/images/top_cykling.jpg';
	topImages[1] = 'fileadmin/template/uss_dk/images/top_lob.jpg';
	topImages[2] = 'fileadmin/template/uss_dk/images/top_blandet.jpg';
	var whichImage = Math.round(Math.random()*(topImages.length-1));
	changeImage("topimage",topImages[whichImage])
}

function changeImage(id,imageUrl) {
	document.images[id].src = imageUrl;
}