document.write('<center>');

var textnumber = 3;
var randomnumber = Math.random() ;
var rand1 = Math.round( (textnumber-1) * randomnumber) + 1 ;
text = new Array

text[1] = '<script language="JavaScript" src="http://anunciosextremadura.100free.com/tradedoubler.js" type="text/javascript"></script>'
text[2] = '<script language="JavaScript" src="http://anunciosextremadura.100free.com/anuncios.js" type="text/javascript"></script>'
text[3] = '<script language="JavaScript" src="http://anunciosextremadura.100free.com/amigos.js" type="text/javascript"></script>'



var mytext = text[rand1]
document.write(text[rand1]);

document.write('</center>');