var theImages = new Array()

theImages[0] = 'images/destaque1.jpg'
theImages[1] = 'images/destaque2.jpg'
theImages[2] = 'images/destaque3.jpg'
theImages[3] = 'images/destaque4.jpg'

var whichImage = Math.round(Math.random() * (theImages.length - 1));

function showImage(idImage)
{
	return document.getElementById(idImage).innerHTML = '<img src="'+theImages[whichImage]+'">';
}