function hidePopupModal(divId)
{
  var div;
  if(document.getElementById)  {
           // Standard way to get element
           div = document.getElementById(divId);
  }else if(document.all)  {
        // Get the element in old IE's
        div = document.all[divId];
  }
  // If the background is hidden ('none') then it will display it ('block').
  // If the background is displayed ('block') then it will hide it ('none').
  div.style.display = 'none';
}

function showPopupModal(divId)
{
  var div;
  if(document.getElementById)  {
           // Standard way to get element
           div = document.getElementById(divId);
  }else if(document.all)  {
        // Get the element in old IE's
        div = document.all[divId];
  }
  // If the background is hidden ('none') then it will display it ('block').
  // If the background is displayed ('block') then it will hide it ('none').
  div.style.display = 'block';
}