$(document).ready( function() {
  setContentHeight();
  $('.zoom').lightBox();
});
$(window).resize( function() {
  setContentHeight();
});
function setContentHeight() {
  newHeight = $(window).height() - $('#header').height() - $('#categories').height() - $('#footer').height() - $('#content .header').height() - 50;
  $('.scrollArea').jScrollPaneRemove();
  if ( $('.scrollArea').height() < newHeight ) {
    $('.scrollArea').css( "height", 'auto' );
    $('#categoryDescription').css( "height", $('.scrollArea').height() + 'px' );
  } else {
    $('.scrollArea').css( "height", newHeight + 'px' );
    $('#categoryDescription').css( "height", newHeight + 'px' );
  }
  $('.scrollArea').jScrollPane();
}