<html>
<head>
<script src="jquery.js"></script>
<script>
$(function(){
$("#includedContent").load("b.html");
});
</script>
</head>
<body>
<div id="includedContent"></div>
</body>
</html>
filter: grayscale(100%);
div.block:last-child:nth-child(odd) {
clear: both;
margin:auto;
float:none;
}