function changeImage(nameBt, image){  
  document[nameBt].src = image; 
 }

function expand(str){
 
   switch (str){
	case "services":
	   document.getElementById("services").style.display = "block";
           document.getElementById("rfid").style.display = "none";
	   break;

	case "rfid":
           document.getElementById("rfid").style.display = "block";
           document.getElementById("services").style.display = "none";
	   break;
    }
}

function openMenu(theMenu)
{
    document.getElementById('service').style.display = "none";
    document.getElementById('RFID').style.display = "none";
    document.getElementById('mobileSolution').style.display = "none";
    document.getElementById('security').style.display = "none";
    document.getElementById('contactUs').style.display = "none";

    theMenu.style.display = "block";
}