function over(nom,img) {                            
	document.images[nom].src = img;
}

function random_header(path, nb) {
    var ranNum= Math.floor(Math.random()* nb) + 1;
	document.getElementById('header').style.backgroundImage="url('" + path + "/images/headers/" + ranNum + ".jpg')";
}

function fixPNG(path) {
	if(navigator.appName == 'Microsoft Internet Explorer' && navigator.appVersion.indexOf("MSIE 7.") == -1) {
		var png = /\.png$/i;
		var imgs = document.getElementsByTagName('img');
		for(var i = 0, l = imgs.length; i < l; i++) {
			if(png.test(imgs.item(i).src)) {
				imgs.item(i).style.width = imgs.item(i).offsetWidth;
				imgs.item(i).style.height = imgs.item(i).offsetHeight;
				imgs.item(i).style.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'' + imgs.item(i).src + '\',sizingMethod=\'image\')';
				imgs.item(i).src = path + '/images/empty.gif';
			}
		}
	}
}

function showhide(question){
	var divs = document.getElementsByTagName('div');
	for (var i = 0; i < divs.length; i++){
		if(divs[i].id.substring(0, 8) == 'question'){
			if(divs[i].id == question){
				if(document.getElementById(divs[i].id).style.display == 'none'){
					document.getElementById(divs[i].id).style.display = 'block';
				}
				else{
					document.getElementById(divs[i].id).style.display = 'none';
				}
			}
			else{
				document.getElementById(divs[i].id).style.display = 'none';
			}
		}
	}
}

function showhideb(id){
	if(document.getElementById(id).style.display == 'none') document.getElementById(id).style.display = 'block';
	else document.getElementById(id).style.display = 'none';
}