Demo no - 30 - Codepedia

Edit This Code :
<html>
<head>
</head>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script><br/>
<input id="txtName" value="" type="text"/>
<input id="hdName" value="codepedia" type="hidden"/>
<button id="btnShow"> Set Hidden field Value</button>
<br/>
<script>
$(document).ready(function(){
$("#btnShow").on('click', function () {
   var getValue=$("#txtName").val();
   $("#hdName").val(getValue);
   alert(getValue);   
 });
});
</script>
</body>
</html>
Result :