<html>
<head>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("p").each(function(i){
$(this).on("click",{x:i},function(event){
alert("The " + $(this).index() + ". paragraph has data: " + event.data.x);
});
});
});
</script>
</head>
<body>
<div style="color:red">Click on each p element to return the data passed with the on() method.</div>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
<p>This is another paragraph.</p>
</body>
</html>