function BlowUpImage(imageId)
{
  
  //alert( "HELLO WORLD" );
  //alert( imageId );
  
  var width = document.getElementById(imageId).width;
  var height = document.getElementById(imageId).height;
  var imageSrc = document.getElementById(imageId).src;
  
  //alert( width );
  //alert( height );
  //alert( imageSrc );

  var img = new Image();
  img.src = imageSrc;
  var mywidth = img.width;
  var myheight = img.height;
  
  //alert('Inside BlowUpImage : ' + mywidth + " : " + myheight);
   
  document.getElementById(imageId).width = mywidth;
  document.getElementById(imageId).height = myheight;
  
}

function ShrinkImage(imageId)
{
  var fact;
  var width = document.getElementById(imageId).width;
  var height = document.getElementById(imageId).height;
  var amt;
  
  if (  document.getElementById(imageId).getAttribute('class') == 'bigImage' ) { amt = 150.0; } else { amt = 50.0;  }
  
  if ( width > height)
  {  fact = width; }
  else
  { fact = height; }
  
  if ( fact > amt )
  { fact /= amt; }
  
 width /= fact;
 height /= fact;
 
 document.getElementById(imageId).width = width;
 document.getElementById(imageId).height = height;
 
}