function showWait()
{
  var waitbg = document.createElement("div");
  waitbg.style.position = "fixed";
  waitbg.style.left = "0px";
  waitbg.style.top = "0px";
  waitbg.style.height = "100%";
  waitbg.style.width = "100%";
  waitbg.style.background = "black";
  waitbg.id = "waitBg";
  if (((navigator.userAgent.toLowerCase().indexOf("msie") != -1) && (navigator.userAgent.toLowerCase().indexOf("opera") == -1)))
  {
    waitbg.style.filter = 'alpha(opacity=30)';
  }
  else // for mozilla
  {
    waitbg.style.opacity = 0.3;
  }
  document.body.appendChild(waitbg);
  
  var waitDiv = document.createElement("div");
  waitDiv.id = "waitDiv";
  waitDiv.style.position = "fixed";
  waitDiv.style.width = "200px";
  waitDiv.style.height = "150px";
  var x = ((document.body.clientWidth/2) < 250)?(0):((document.body.clientWidth/2)-250);
  var y = ((document.body.clientHeight/2) < 50)?(0):((document.body.clientHeight/2)-50);
  waitDiv.style.left = x + "px";
  waitDiv.style.top = y + "px";
  waitDiv.style.background = "#dddddd";
  waitDiv.style.border = "1px solid black";
  waitDiv.style.color = "black";
  waitDiv.style.font = "bold 18px Tahoma";
  waitDiv.style.paddingTop = "40px";
  waitDiv.style.textAlign = "center";
  waitDiv.innerHTML = "Please Wait...<br/><br/><img src='/scripts/pleasewait.gif' />";
  document.body.appendChild(waitDiv);
}

function hideWait()
{
  document.body.removeChild(document.getElementById('waitDiv'));
  document.body.removeChild(document.getElementById('waitBg'));
}