var nbimage= 30;
var width;
var height;
var url;
var alte;
function banniere()
{
numimage= Math.round(Math.random()*(nbimage-1)+1);
if (numimage <= 10)
{
gotosite = "index.html";
url = "img/top-home-1.jpg";
alte = "Lonay";
}
if (numimage > 10 && numimage <= 20)
{
gotosite = "index.html";
url = "img/top-home-2.jpg";
alte = "Lonay";
}
if (numimage > 20)
{
gotosite = "index.html";
url = "img/top-home-3.jpg";
alte = "Lonay";
}
if(gotosite != "")
	{
	document.write ('<a href="' + gotosite + '">');	
	}
document.write('<img src="' + url + '" alt="' + alte + '" border="0" />')
if(gotosite != "")
	{
	document.write('</a>')
	}
}