i was following your tutorial on how to use ajax jquery with php: http://www.wallpaperama.com/forums/_ayxrzw.html i wanted to take it to the next level. i wanted to use a function in DOM aswell as in my AJAX contente. for example, lets say i have a div with a class called 'shared' and this class has some CSS that makes the div appear to be a link. so when you click on the link from the DOM, you get an alert that says hello. it works if i use this code: 
$(document).ready(function() {
	$(".shared").click(function() {
		alert('Hello');
	});
});
how about if i have the same div in my AJAX content. since im using PHP, i want the same div with the same class in my post.php file. but when i click on the div, it does not show anything. so here is where it matters, i need to use the live event handler. you can read more at the official jquery site: .live() so i changed my code to this: 
$(document).ready(function() {
	$(".shared").live("click",function() {
		alert('Hello');
	});
});
now it works.. here is the complete code i used: 1. create a folder called: test. 2. create a file called index.php and copy and paste the following code 3. create a new called post.php and copy and paste the post.php code from below 4. upload it to your PHP server and see it in action.
index.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Simple JQuery Ajax Example by Webune.com</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
// This functions starts the ajax to show the output from post.php
// COPYRIGHT: WWW.WEBUNE.COM
//http://www.wallpaperama.com/forums/_ayxrzw.html
$(document).ready(function() {
	$(".shared").live("click",function() {
		alert('Hello');
	});
});
function StartAjax(ResultsId){
	$.ajax({
	  type: "GET",
	  url: "post.php",
	  cache: false,
	  data: "name=John&location=Boston",
	  success: function(html){
		$("#"+ResultsId).append(html);
	  }
	
	});
}
</script>

<style type="text/css">
.shared {
	text-decoration:underline;color:#00F;margin:20px;cursor:pointer;
}
</style>
</head>
<body>
<div class="shared" >This is From index.php Click me</div>
<a href="#" onclick="StartAjax('ResultsId');">Click Here to see content from post.php</a>
<div id="ResultsId"></div>
</body>
</html>


post.php
<?php
// This functions starts the ajax to show the output from post.php
// COPYRIGHT: WWW.WEBUNE.COM
//http://www.wallpaperama.com/forums/_ayxrzw.html
?>
<div class="shared" style="text-decoration:underline;color:#00F">This is From post.php. Click me</div>