if (document.images) {
    homebuttonup                     = new Image();
    homebuttonup.src                 = "assets/nav_home_reg.jpg" ;
    homebuttondown                   = new Image() ;
    homebuttondown.src               = "assets/nav_home_roll.jpg" ;
	
	gettingstartedbuttonup           = new Image();
    gettingstartedbuttonup.src       = "assets/nav_gettingstarted_reg.jpg" ;
    gettingstartedbuttondown         = new Image() ;
    gettingstartedbuttondown.src     = "assets/nav_gettingstarted_roll.jpg" ;
	
	aboutusbuttonup                  = new Image();
    aboutusbuttonup.src              = "assets/nav_aboutus_reg.jpg" ;
    aboutusbuttondown                = new Image() ;
    aboutusbuttondown.src            = "assets/nav_aboutus_roll.jpg" ;
	
	glossarybuttonup                 = new Image();
    glossarybuttonup.src             = "assets/nav_glossary_reg.jpg" ;
    glossarybuttondown               = new Image() ;
    glossarybuttondown.src           = "assets/nav_glossary_roll.jpg" ;
	
	careersbuttonup                  = new Image();
    careersbuttonup.src              = "assets/nav_careers_reg.jpg" ;
    careersbuttondown                = new Image() ;
    careersbuttondown.src            = "assets/nav_careers_roll.jpg" ;
	
	servicesbuttonup                 = new Image();
    servicesbuttonup.src             = "assets/nav_services_reg.jpg" ;
    servicesbuttondown               = new Image() ;
    servicesbuttondown.src           = "assets/nav_services_roll.jpg" ;
	
	contactbuttonup                  = new Image();
    contactbuttonup.src              = "assets/nav_contact_reg.jpg" ;
    contactbuttondown                = new Image() ;
    contactbuttondown.src            = "assets/nav_contact_roll.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" );
    }
}