01.<html>
02.<head>
03.<script type="text/javascript">
04.function ValidateForm()
05.{
06.var input = document.getElementsByTagName('INPUT');
07.for (var i = 0, n = input.length; i < n; i = i + 1) {
08.
09. if (!input[i].value) {
10. alert("PLease Enter '"+ input[i].attributes.item(1).nodeValue+"' value. ")
11. input[i].focus();
12. return false;
13. }
14.}
15.}
16.</script>
17.</head>
18.<body>
19.<form action="registerformsave.php" method="post" name="frmMain" onSubmit="return ValidateForm();">
20.<input type="text" name="FirstName" id="FirstName" />
21.<input type="text" name="LastName" id="LastName" />
22.<input type=submit value="sumit">
23. </form>
24.</body>
25.</html>
