var img = new Image();
  img.src = 'Images/loading.gif';

  function check_domain()
  {

    domain = document.getElementById('domain').value;
    if (domain == "")
      {
      alert("لطفا نام دامنه را وارد کنید.");
      return;
      }

    //document.getElementById('domspace').style.display = 'none';
    //document.getElementById('domspace2').style.display = 'none';
    document.getElementById('result').style.display = 'block';
    document.getElementById('result').innerHTML = '';

    document.getElementById('result').appendChild(img);
    jsel = document.createElement('script');
    jsel.type = "text/javascript";
    jsel.src  = "check_domain.php?domain=";
    jsel.src += domain;
    jsel.src += "&ext=" + document.getElementById('ext').value;
    document.body.appendChild(jsel);
  }

  function find_position(obj)
  {
    var curleft = curtop = 0;
    if (obj.offsetParent)
      {
        do
          {
	  curleft += obj.offsetLeft;
	  curtop += obj.offsetTop;
          }
        while (obj = obj.offsetParent);
      }
    else
      alert('Not Supported.');

    return [curleft,curtop];
  }

  function show_submenu(menu)
  {
    var submenu = null;
    for (i=0; i<menu.childNodes.length; i++)
      if (menu.childNodes[i].tagName == 'UL')
        submenu = menu.childNodes[i];

    pos = find_position(menu);
    new_submenu = submenu.cloneNode(true);
    new_submenu.id = 'submenu';
    new_submenu.style.display = 'block';
    new_submenu.style.left = pos[0] + "px";
    new_submenu.style.top = pos[1] + 38 + "px";
    document.body.appendChild(new_submenu);
  }

  function hide_submenu(menu)	
  {
    submenu = document.getElementById('submenu');
    document.body.removeChild(submenu);
    submenu = null;
  }