var pics = new Array ( 'car.png', 'house.png', 'couple.png' );
var iter = 0;

function chng_pic() {
	iter = (iter + 1) % pics.length;
	document.getElementById('chnpic').src = '/images/'+pics[iter];
	setTimeout( 'chng_pic()', 5000 );
}


window.onload = function() { setTimeout( 'chng_pic()', 5000 ); };