if (document.images) {
    homebuttonup       = new Image();
    homebuttonup.src   = "images/menuHome1.png" ;
    homebuttondown     = new Image() ;
    homebuttondown.src = "images/menuHome2.png" ;
	
    buybuttonup       = new Image();
    buybuttonup.src   = "images/menuBuy1.png" ;
    buybuttondown     = new Image() ;
    buybuttondown.src = "images/menuBuy2.png" ;
	
    reviewbuttonup       = new Image();
    reviewbuttonup.src   = "images/menuReviews1.png" ;
    reviewbuttondown     = new Image() ;
    reviewbuttondown.src = "images/menuReviews2.png" ;
    
    faqbuttonup       = new Image();
    faqbuttonup.src   = "images/menuFAQ1.png" ;
    faqbuttondown     = new Image() ;
    faqbuttondown.src = "images/menuFAQ2.png" ;
	
    contactbuttonup       = new Image();
    contactbuttonup.src   = "images/menuContact1.png" ;
    contactbuttondown     = new Image() ;
    contactbuttondown.src = "images/menuContact2.png" ;

}
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" );
    }
}