function get_random1()
{
    var ranImg = Math.round(Math.random() * 2);
    return ranImg;
}

function getTopImg() {
	if ( document.getElementById('TopImg') ) {
	var whichImg = get_random1();
	var TopImg = new Array(3)
		TopImg[0] = 'images/beplantning_1.jpg';
		TopImg[1] = 'images/gruslastbil.jpg';
		TopImg[2] = 'images/rodfjernelse_1.jpg';

		document.write ("<img src='" +TopImg[whichImg]+ "' alt='Billeder' />")
 	}
}

function get_random2()
{
    var ranImg = Math.round(Math.random() * 4);
    return ranImg;
}

function getContentImg() {
	if ( document.getElementById('TopImg') ) {
	var whichImg = get_random2();
	var ContentImg = new Array(5)
		ContentImg[0] = 'images/lastbil2.jpg';
		ContentImg[1] = 'images/lastbil_x.gif';
		ContentImg[2] = 'images/new/lastbil_laesses.jpg';
		ContentImg[3] = 'images/new/opstilling.jpg';
		ContentImg[4] = 'images/new/to_lastbiler.jpg';
		
		document.write ("<img src='" +ContentImg[whichImg]+ "' alt='Billeder' />")
 	}
}