var nbimage= 3;
var width;
var height;
var url;
function banniere()
{
numimage= Math.round(Math.random()*(nbimage-1)+1);
if (numimage <= 1)
{
gotosite = ""
width = 760;
height = 100;
url = "t1s.jpg";
}
if (numimage > 1 && numimage <= 2)
{
gotosite = "";
width = 760;
height = 100;
url = "t2s.jpg";
}
if (numimage > 2 && numimage <= 3)
{
gotosite = "";
width = 760;
height = 100;
url = "t3s.jpg";
}

if(gotosite != "")
	{
	document.write ('<A HREF="' + gotosite + '" target="_parent">');	
	}
document.write('<IMG SRC="' + url + '" WIDTH=' + width + ' HEIGHT=' + height + '" BORDER=0>')
if(gotosite != "")
	{
	document.write('</A>')
	}
}