// JavaScript Document

if (document.images) {
    contentbox01buttonup       = new Image();
    contentbox01buttonup.src   = "images/contentboxbtn01_up.gif" ;
    contentbox01buttonover     = new Image() ;
    contentbox01buttonover.src = "images/contentboxbtn01_over.gif" ;
	contentbox01buttondown     = new Image() ;
    contentbox01buttondown.src = "images/contentboxbtn01_down.gif" ;
}
if (document.images) {
    contentbox02buttonup       = new Image();
    contentbox02buttonup.src   = "images/contentboxbtn02_up.gif" ;
    contentbox02buttonover     = new Image() ;
    contentbox02buttonover.src = "images/contentboxbtn02_over.gif" ;
	contentbox02buttondown     = new Image() ;
    contentbox02buttondown.src = "images/contentboxbtn02_down.gif" ;
}
if (document.images) {
    contentbox03buttonup       = new Image();
    contentbox03buttonup.src   = "images/contentboxbtn03_up.gif" ;
    contentbox03buttonover     = new Image() ;
    contentbox03buttonover.src = "images/contentboxbtn03_over.gif" ;
	contentbox03buttondown     = new Image() ;
    contentbox03buttondown.src = "images/contentboxbtn03_down.gif" ;
}

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" );
    }
}

function buttonover ( buttonname )
{
    if (document.images) {
      document[ buttonname ].src = eval( buttonname + "over.src" );
    }
}