// Creating Images and setting up their src properties
if (document.images)
{

// Primary Navigation - Home Page
btnHeadline_on      = new Image
btnHeadline_on.src  ="http://www.aaas.org/images/btnHeadlineB_on.gif"
btnHeadline_off     = new Image
btnHeadline_off.src ="http://www.aaas.org/images/btnHeadline_off.gif"

btnAbout_on      = new Image
btnAbout_on.src  ="http://www.aaas.org/images/btnAboutB_on.gif"
btnAbout_off     = new Image
btnAbout_off.src ="http://www.aaas.org/images/btnAbout_off.gif"

btnScionline_on      = new Image
btnScionline_on.src  ="http://www.aaas.org/images/btnScionlineB_on.gif"
btnScionline_off     = new Image
btnScionline_off.src ="http://www.aaas.org/images/btnScionline_off.gif"

btnPolicy_on      = new Image
btnPolicy_on.src  ="http://www.aaas.org/images/btnPolicyB_on.gif"
btnPolicy_off     = new Image
btnPolicy_off.src ="http://www.aaas.org/images/btnPolicy_off.gif"

btnEducation_on      = new Image
btnEducation_on.src  ="http://www.aaas.org/images/btnEducationB_on.gif"
btnEducation_off     = new Image
btnEducation_off.src ="http://www.aaas.org/images/btnEducation_off.gif"

btnCareers_on      = new Image
btnCareers_on.src  ="http://www.aaas.org/images/btnCareersB_on.gif"
btnCareers_off     = new Image
btnCareers_off.src ="http://www.aaas.org/images/btnCareers_off.gif"

btnPubs_on      = new Image
btnPubs_on.src  ="http://www.aaas.org/images/btnPubsB_on.gif"
btnPubs_off     = new Image
btnPubs_off.src ="http://www.aaas.org/images/btnPubs_off.gif"

btnMembers_on      = new Image
btnMembers_on.src  ="http://www.aaas.org/images/btnMembersB_on.gif"
btnMembers_off     = new Image
btnMembers_off.src ="http://www.aaas.org/images/btnMembers_off.gif"


// Primary Navigation - Secondary & Tertiary Pages
btnHeadline2_on      = new Image
btnHeadline2_on.src  ="http://www.aaas.org/images/btnHeadline2_on.gif"
btnHeadline2_off     = new Image
btnHeadline2_off.src ="http://www.aaas.org/images/btnHeadline2_off.gif"

btnAbout2_on      = new Image
btnAbout2_on.src  ="http://www.aaas.org/images/btnAbout2_on.gif"
btnAbout2_off     = new Image
btnAbout2_off.src ="http://www.aaas.org/images/btnAbout2_off.gif"

btnScionline2_on      = new Image
btnScionline2_on.src  ="http://www.aaas.org/images/btnScionline2_on.gif"
btnScionline2_off     = new Image
btnScionline2_off.src ="http://www.aaas.org/images/btnScionline2_off.gif"

btnPolicy2_on      = new Image
btnPolicy2_on.src  ="http://www.aaas.org/images/btnPolicy2_on.gif"
btnPolicy2_off     = new Image
btnPolicy2_off.src ="http://www.aaas.org/images/btnPolicy2_off.gif"

btnEducation2_on      = new Image
btnEducation2_on.src  ="http://www.aaas.org/images/btnEducation2_on.gif"
btnEducation2_off     = new Image
btnEducation2_off.src ="http://www.aaas.org/images/btnEducation2_off.gif"

btnCareers2_on      = new Image
btnCareers2_on.src  ="http://www.aaas.org/images/btnCareers2_on.gif"
btnCareers2_off     = new Image
btnCareers2_off.src ="http://www.aaas.org/images/btnCareers2_off.gif"

btnPubs2_on      = new Image
btnPubs2_on.src  ="http://www.aaas.org/images/btnPubs2_on.gif"
btnPubs2_off     = new Image
btnPubs2_off.src ="http://www.aaas.org/images/btnPubs2_off.gif"

btnMembers2_on      = new Image
btnMembers2_on.src  ="http://www.aaas.org/images/btnMembers2_on.gif"
btnMembers2_off     = new Image
btnMembers2_off.src ="http://www.aaas.org/images/btnMembers2_off.gif"

// Secondary Navigation
btnDspp_on      = new Image
btnDspp_on.src  ="http://www.aaas.org/images/btnDspp_on.gif"
btnDspp_off     = new Image
btnDspp_off.src ="http://www.aaas.org/images/btnDspp_off.gif"

btnDip_on      = new Image
btnDip_on.src  ="http://www.aaas.org/images/btnDip_on.gif"
btnDip_off     = new Image
btnDip_off.src ="http://www.aaas.org/images/btnDip_off.gif"

}


// roll over ON function
function rollOn(imgName)
{
  if (document.images)
  {
   document[imgName].src=eval(imgName + "on.src");
  }
}

// roll over OFF function
function rollOff(imgName)
{
  if (document.images)
  {
   document[imgName].src=eval(imgName + "off.src");
  }
}
// -----------------------