<html>
<head>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$("#davl").keyup(function () {
var dav1 = $("#davl").val();
var dav2 = +dav1*6;
alert (dav2);
$("#itog1").text(dav1);
$("#itog2").text(dav2);
});
});
</script>
</head>
<body>
<table align="center" width="280px" border="1">
<tr>
<td align="center" colspan="2">
<form>
Введите: <input type="text" name="davl" size="7" id="davl">
</form>
</td>
</tr>
<tr>
<td align="left" width="50%"><span id="itog1"></span></td>
<td align="left" width="50%"><span id="itog2"></span></td>
</tr>
</table>
</body>
</html>
Все же работает.