jQuery(document).ready(function($){
  $('#column4 #clinical_plus_rollover').hover(function(){
    $('#clinical_rollover').css('background-position', '0 0').fadeIn(800);
  },function() {
    $('#clinical_rollover').css('background-position', '0 550px').fadeOut(800);
  });
  $('#column4 #red_plus_rollover').hover(function(){
    $('#red_rollover').css('background-position', '0 0').fadeIn(800);
  },function() {
    $('#red_rollover').css('background-position', '0 450px').fadeOut(800);
  });
  $('#column4 #blue_plus_rollover').hover(function(){
    $('#blue_rollover').css('background-position', '0 0').fadeIn(800);
  },function() {
    $('#blue_rollover').css('background-position', '0 450px').fadeOut(800);
  });
  $('#column4 #green_plus_rollover').hover(function(){
    $('#green_rollover').css('background-position', '0 0').fadeIn(800);
  },function() {
    $('#green_rollover').css('background-position', '0 450px').fadeOut(800);
  });
});