var nbimage= 40;
var width;
var height;
var url;
var alte;
function banniere()
{
numimage= Math.round(Math.random()*(nbimage-1)+1);
if (numimage <= 10)
{
gotosite = "";
width = 100;
height = 300;
url = "images/profile/opo1.jpg";
alte = "INEOS Olephins & polymers USA";
}
if (numimage > 10 && numimage <= 20)
{
gotosite = "";
width = 100;
height = 300;
url = "images/profile/opo2.jpg";
alte = "INEOS Olephins & polymers USA";
}
if (numimage > 20 && numimage <= 30)
{
gotosite = "";
width = 100;
height = 300;
url = "images/profile/opo3.jpg";
alte = "INEOS Olephins & polymers USA";
}
if (numimage > 30)
{
gotosite = "";
width = 100;
height = 300;
url = "images/profile/opo4.jpg";
alte = "INEOS Olephins & polymers USA";
}
if(gotosite != "")
	{
	document.write ('<a href="' + gotosite + '">');	
	}
document.write('<img src="' + url + '" width=' + width + ' height=' + height + ' alt="' + alte + '" />')
if(gotosite != "")
	{
	document.write('</a>')
	}
}