function fct_expand_collapse(item) {
	calc = document.getElementById(item);
	img = "img" + item;
	if(calc.style.display == 'none') {
		calc.style.display = 'block';
		document.images[img].src = "http://www.produbatiment.be/media/img/minus.gif";
	} else {
		calc.style.display = 'none';
		document.images[img].src = "http://www.produbatiment.be/media/img/plus.gif";
	}
}


// Rotating ads
var passages_ad = 1;
function rotate_ad(count) {
	// Hide all top_ad_xxx div
	for(i=1;i<=count;i++) {
		var temp_div = document.getElementById('ad_'+i);
		temp_div.style.display = 'none';
	}

	passages_ad++;
	if(passages_ad>count) passages_ad=1;

	var div_to_show = document.getElementById('ad_'+passages_ad);
	div_to_show.style.display = 'block';

	window.setTimeout("rotate_ad("+count+")",7000);
}