$(function(){
// to assign additional class in centerModule 
	if($('.centerModule').length){
			$('.centerModule').each(function(e){$(this).attr('id','modules'+e+'');})
			equalHeight($('#modules0, #modules1'));
			equalHeight($('#modules2, #modules3'));
			}
	});

// Equal Height 
	function equalHeight(group) {
		var tallest = 0;
		group.each(function() {
			var thisHeight = $(this).height();
			if(thisHeight > tallest) {
				tallest = thisHeight;
			}
		});
		group.height(tallest);
	}