if (document.images) {

    office_locations_bellevue_up       = new Image();
    office_locations_bellevue_up.src   = "images/office_locations_bellevue.png" ;
    office_locations_bellevue_down     = new Image() ;
    office_locations_bellevue_down.src = "images/office_locations_bellevue_rollover.png" ;

    office_locations_catawba_up       = new Image();
    office_locations_catawba_up.src   = "images/office_locations_catawba.png" ;
    office_locations_catawba_down     = new Image() ;
    office_locations_catawba_down.src = "images/office_locations_catawba_rollover.png" ;
    
    office_locations_port_clinton_up       = new Image();
    office_locations_port_clinton_up.src   = "images/office_locations_port_clinton.png" ;
    office_locations_port_clinton_down     = new Image() ;
    office_locations_port_clinton_down.src = "images/office_locations_port_clinton_rollover.png" ;

    office_locations_put_in_bay_up       = new Image();
    office_locations_put_in_bay_up.src   = "images/office_locations_put_in_bay.png" ;
    office_locations_put_in_bay_down     = new Image() ;
    office_locations_put_in_bay_down.src = "images/office_locations_put_in_bay_rollover.png" ;

    office_locations_sandusky_up       = new Image();
    office_locations_sandusky_up.src   = "images/office_locations_sandusky.png" ;
    office_locations_sandusky_down     = new Image() ;
    office_locations_sandusky_down.src = "images/office_locations_sandusky_rollover.png" ;
  
    ad_2_up       = new Image();
    ad_2_up.src   = "images/ad_2.jpg" ;
    ad_2_down     = new Image() ;
    ad_2_down.src = "images/ad_2_rollover.jpg" ;
  
    ad_3_up       = new Image();
    ad_3_up.src   = "images/ad_3.jpg" ;
    ad_3_down     = new Image() ;
    ad_3_down.src = "images/ad_3_rollover.jpg" ;

}
function buttondown( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "_down.src" );
    }
}
function buttonup ( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "_up.src" );
    }
}