/*
 * If toggle is used other than for source
 * abstract the toggle function
*/
function displaySourceToggle(elem, callee)
{
   var DOMElem = document.getElementById(elem);

   if(eval(DOMElem))
   {
      var dProperty = DOMElem.style;

      if(dProperty.display == 'none' || dProperty.display == '')
      {
         dProperty.display = 'block';
         callee.innerHTML = 'Hide source'; 
      }
      else
      {
         dProperty.display = 'none';
         callee.innerHTML = 'View source';
      }
   }
   else
      alert('Element ' + elem + ' does not exist.');
}