01.<html>
02.<head>
03.<title>ThaiCreate.Com Tutorials</title>
04.<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
06.</head>
07.<body>
08.<input type="text" id="txt1" name="txt1"><br />
09.<input type="text" id="txt2" name="txt3"><br />
10.<input type="text" id="txt3" name="txt3"><br />
11.<input type="button" name="btnSend" id="btnSend" value="Send" disabled>
12.
13.<script type="text/javascript">
14. $(document).ready(function() {
15.
16. $("input[type='text']").change(function () {
17. $("#btnSend").prop("disabled", false);
18. $("input[type='text']").each(function () {
19. if($(this).val() == "")
20. {
21. alert('input : ' + $(this).attr('id'));
22. $("#btnSend").prop("disabled", true);
23. }
24. });
25. });
26.
27. });
28.</script>
29.
30.</body>
31.</html>
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