Try this
You have to include your jquery file that can be downloaded from any website.
<html>
<body>
<script type="text/javascript" src="your_jquery_file.js"></script>
<script type="text/javascript">
function load_page()
{
$.post("your_page.html",function(data){
$("#page_holder").html(data);
});
}
</script>
<button onclick="load_page()">Load</button>
<div id="page_holder"></div>
</body>
</html>