currentpic = 0;

function skiftbillede() {
	if (currentpic == billeder.length - 1) {
	currentpic = 0;
	} else {
	currentpic = currentpic + 1;
	}
document.getElementById('praesbillede').src = billeder[currentpic];
document.getElementById('praesbillede').alt = picalt[currentpic];
setTimeout(skiftbillede,9000);
}

function praesbillede_click() {
window.open('http://' + pichref[currentpic]);return false;
}