// JavaScript Document

var r_text = new Array ();
r_text[0] = "<style type='text/css'><!-- #topbanner {background-image: url(/images/mntl-header/mntl-research-01.jpg);} --></style>";
r_text[1] = "<style type='text/css'><!-- #topbanner {background-image: url(/images/mntl-header/mntl-research-02.jpg);} --></style>";
var i = Math.round((r_text.length - 1) * Math.random());

document.write(r_text[i]);