<script type="text/javascript">
 var $n = jQuery.noConflict(); //prevents jquery conflict
 $n().ready(function() { 
 
 $n("#btn_postdata").click(function() {
 
 var str = "name=nikunj&age=22"; //pass post data to server.php 
 $n.ajax({
 type: "POST", //send data using post method
 url: "server.php", //this is post data to server.php
 data: str,
 success: function(msg){
 alert(msg); //this is return data from server.php
 }
 });
 
 }); 
 });
 </script>