Ajax Using Jquery

//------demo.php--------- 

<script src="http://code.jquery.com/jquery-1.9.1.js"></script>

<script>

function searchlist()
{
 var value=$('#search').val();
 $.ajax({
  type:'post',
  url:'action.php',
   data:'search='+value,

                beforeSend: function(){
      $("#result").html('<h1>Loading  ...</h1>'); 
  },

                success:function(value){
      $("#result").html(value);
  }
 });
}

</script> 

<input type="text" id="search" >

<input type="button" id="btn" onclick="seacrhlist()" value="GO">

<div id="result"></div> 

//---------action.php------------

<?php 

if(isset($_POST['search']))

{

  echo file_get_contents("http://google.com"); 

  echo "Hello Mr ".$_POST['search']." Welcome to Ajax Demo example <br />";

  echo "========================================================== <br />";

  echo "Author: Avinash Kumar Singh <br />"; 

} 

 ?>