<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Hello Jq</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script language="javascript" src="js/jquery-1.3.2.js"></script>
<script language="javascript">
function GetUserNameValues(strValue)
{
$.get("ajax.php", {value:strValue}, function(text){
alert(text);
});
}
</script>
</head>
<body>
<form name="form" method="POST">
<div style="text-align:center;margin-top:20%;">
<table>
<tbody>
<tr>
<td><input type="text" id="txtName" name="txtName" value="" onblur="return GetUserNameValues(this.value);"/></td>
</tr>
</tbody>
</table>
</div>
</form>
</body>
</html>
ajax.php
echo $_GET['value'];
?>