function mainover(subname) { //main menu state to "on" when rolled over
		document.getElementById(subname).src='/images/menu/'+subname+'-over.jpg';		//mainmenu on state
}
function mainout(subname) { //main menu state to "off" when rolled out
		document.getElementById(subname).src='/images/menu/'+subname+'-off.jpg';		//mainmenu off state
}

if (document.images) //preload
{
  // Main menu
  pic1= new Image(); 
  pic1.src="/images/menu/home-over.jpg";
  pic2= new Image(); 
  pic2.src="/images/menu/home-off.jpg";
  pic3= new Image(); 
  pic3.src="/images/menu/aboutus-over.jpg"; 
  pic4= new Image(); 
  pic4.src="/images/menu/aboutus-off.jpg"; 
  pic5= new Image(); 
  pic5.src="/images/menu/service-over.jpg"; 
  pic6= new Image(); 
  pic6.src="/images/menu/service-off.jpg"; 
  pic7= new Image(); 
  pic7.src="/images/menu/expertise-over.jpg";
  pic8= new Image(); 
  pic8.src="/images/menu/expertise-off.jpg";
  pic9= new Image(); 
  pic9.src="/images/menu/portfolio-over.jpg";
  pic10= new Image(); 
  pic10.src="/images/menu/portfolio-off.jpg";
  pic11= new Image(); 
  pic11.src="/images/menu/working-over.jpg";
  pic12= new Image(); 
  pic12.src="/images/menu/working-off.jpg";
  pic13= new Image(); 
  pic13.src="/images/menu/knowledge-over.jpg";
  pic14= new Image(); 
  pic14.src="/images/menu/knowledge-off.jpg";


  // Top menu
  pic20= new Image(); 
  pic20.src="/images/menu/contact-over.jpg";
  pic22= new Image(); 
  pic22.src="/images/menu/contact-off.jpg";
  pic23= new Image(); 
  pic23.src="/images/menu/video-off.jpg";
  pic24= new Image(); 
  pic24.src="/images/menu/video-over.jpg";
  pic25= new Image(); 
  pic25.src="/images/menu/jobs-over.jpg";
  pic26= new Image(); 
  pic26.src="/images/menu/jobs-off.jpg";
  pic27= new Image(); 
  pic27.src="/images/menu/partner-over.jpg";
  pic28= new Image(); 
  pic28.src="/images/menu/partner-off.jpg";
  pic29= new Image(); 
  pic29.src="/images/menu/labs-over.jpg";
  pic30= new Image(); 
  pic30.src="/images/menu/labs-off.jpg";
}