01.<html>
02.<head>
03.<title>ThaiCreate.Com Tutorial</title>
04.</head>
05.<body>
06.<script language="VbScript">
07. Function btnSubmit_OnClick()
08. If Document.form1.rdo1.Checked = False And Document.form1.rdo2.Checked = False Then
09. MsgBox("Please Click Radio Option")
10. Exit Function
11. End IF
12. Document.form1.submit()
13. End Function
14.</script>
15.<form action="page.cgi" method="post" name="form1">
16.Radio 1
17.<input name="rdoCheckbox" type="radio" id="rdo1" value="Y">
18.<br>Radio 2
19.<input name="rdoCheckbox" type="radio" id="rdo2" value="Y"><br>
20.<input name="btnSubmit" type="button" value="Submit">
21.</form>
22.</body>
23.</html>
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