// JavaScript Document
$(document).ready(function() {	

  $('#tabMenu > li').click(function(){
        
    $('#tabMenu > li').removeClass('selected');
    
    $(this).addClass('selected');
    
    $('.boxBody div').slideUp('1500');
    
    //Look for the right DIV in boxBody according to the Navigation UL index, therefore, the arrangement is very important.
    $('.boxBody div:eq(' + $('#tabMenu > li').index(this) + ')').slideDown('1500');
    
  });
	
});