var randnum = Math.random();

var inum = 1;
var rand1 = Math.round(randnum * (inum)) + 1;
images = new Array
// confirm("#portal-header {  background-image: url(/BHC/portal_skins/bhc_skin/background/header-bg" + rand1 + ".png);  }")
document.write('      <style type="text/css" media="screen"><!--  #portal-header {     background-image: url(/BHC/portal_skins/bhc_skin/background/header-bg' + rand1 + '.png);  } --></style')