function obj(id) {
  if (document.layers) {
	//alert("get layers:!!!")
    return document.layers[id];
  }
  else if (document.all) {
	//alert("document.all:!!!")
	return document.all[id]
  } else if (document.getElementById) {
    //alert("getelementbyId:!!!")
	return document.getElementById(id)
  }

else {
    alert('Warning!\nJava script not working properly on this kind of browser. \nPlease contact us to solve the problem.');
  }
  return true;
}
var vd;
function display(id) {
  if (document.getElementById) { // internet explorer
	document.getElementById(id).style.display = "block";
  }
  else if (document.layers) { //safari
    document.layers[id].visibility = "show";
  }
  else if (document.all) {
    document.all[id].style.visibility = "visible"; // firefox. netscape
  }
  else {
    alert('Unknown browser category.');
  }
  return true;
}

function hide(id) {
   if (document.getElementById) {
  	document.getElementById(id).style.display = "none";
  }
  else if (document.layers) {
    document.layers[id].visibility = "hide";
  }
  else if (document.all) {
    document.all[id].style.visibility = "hidden";
  }
  else {
    alert('Unknown browser category.');
  }
  return true;
}