function TrocaBanner2() { 

var x = 1; 
x = Math.floor(Math.random()*3); 

if(x == 1){
document.write('<a href="http://www.oncotech.com.br" target="_blank"><img border="0" src="images/banner/oncotech_160x60.jpg" alt="Oncotech" width="160" height="60"></a>'); 
}
else 
{ 
if(x == 2){
document.write('<a href="http://www.helionpovoa.com.br/" target="_blank"><img src="images/banner/helionpovoa_160x60.jpg" alt="H&eacute;lion P&oacute;voa" longdesc="http://www.helionpovoa.com.br/" /></a>'); 
}
else 
{ 
document.write('<img border="0" src="images/banner/alif_ok.gif" alt="Alif" width="160" height="60">'); 
}}}