if (document.images) {
	aboutbuttonup       = new Image();
    aboutbuttonup.src   = "images/home/aboutus_side_btn.jpg" ;
    aboutbuttondown     = new Image() ;
    aboutbuttondown.src = "images/home/aboutus_side_btn_hover.jpg" ;
	
    automationbuttonup       = new Image();
    automationbuttonup.src   = "images/home/automation_side_btn.jpg" ;
    automationbuttondown     = new Image() ;
    automationbuttondown.src = "images/home/automation_side_btn_hover.jpg" ;

    cyclomaticbuttonup       = new Image();
    cyclomaticbuttonup.src   = "images/home/cyclomatic_side_btn.jpg" ;
    cyclomaticbuttondown     = new Image() ;
    cyclomaticbuttondown.src = "images/home/cyclomatic_side_btn_hover.jpg" ;
	
	powconbuttonup       = new Image();
    powconbuttonup.src   = "images/home/powcon_side_btn.jpg" ;
    powconbuttondown     = new Image() ;
    powconbuttondown.src = "images/home/powcon_side_btn_hover.jpg" ;
	
    plazcraftbuttonup       = new Image();
    plazcraftbuttonup.src   = "images/home/plazcraft_side_btn.jpg" ;
    plazcraftbuttondown     = new Image() ;
    plazcraftbuttondown.src = "images/home/plazcraft_side_btn_hover.jpg" ;

    pcboardsbuttonup       = new Image();
    pcboardsbuttonup.src   = "images/home/pcboards_side_btn.jpg" ;
    pcboardsbuttondown     = new Image() ;
    pcboardsbuttondown.src = "images/home/pcboards_side_btn_hover.jpg" ;
	
	
	nextbuttonup       = new Image();
    nextbuttonup.src   = "images/header/navigation/next_btn.png" ;
    nextbuttondown     = new Image() ;
    nextbuttondown.src = "images/header/navigation/next_btn_hover.png" ;
	
	prevbuttonup       = new Image();
    prevbuttonup.src   = "images/header/navigation/previous_btn.png" ;
    prevbuttondown     = new Image() ;
    prevbuttondown.src = "images/header/navigation/previous_btn_hover.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" );
    }
}