01.<html>
02.<head>
03.<title>ThaiCreate.Com Tutorial</title>
04.</head>
05.<body>
06.<form name="frmMain" action="" method="post">
07.<script language="JavaScript">
08. function chkNumber(ele)
09. {
10. var vchar = String.fromCharCode(event.keyCode);
11. if ((vchar<'0' || vchar>'9') && (vchar != '.')) return false;
12. ele.onKeyPress=vchar;
13. }
14.</script>
15.Input Number <input type="text" name="txtNumber" value="" OnKeyPress="return chkNumber(this)">
16.<input type="submit" name="btnSubmit" value="Submit">
17.</form>
18.</body>
19.</html>
