<script
language="javascript"
type="text/javascript">
function
calc(form)
{
var
laps =
(isNaN(
parseInt(form.laps.value)
))
?
0
:
parseInt(form.laps.value);
if
(laps)
{
var
minutes =
(form.minutes.value
==
"")
?
0
:
parseInt(form.minutes.value);
var
seconds =
(form.seconds.value
==
"")
?
0
:
parseInt(form.seconds.value);
return(
((minutes
*
60
+
seconds)
/
laps)
+
" seconds");
}
else
return
("");
}
</script>
<form
name=raceform>
<table
border=1
width=300>
<tr>
<td>Number of laps:</td>
<td><input
type=text
name=laps
size=2></td>
</tr>
<tr>
<td>Desired time:</td>
<td><input
type=text
name=minutes
size=2><b>:</b><input
type=text
name=seconds
size=2>
(mm:ss)</td>
</tr>
<tr>
<td
colspan=2
align=center><input
type=button
value="Calculate"
onclick="this.form.laptime.value=calc(this.form);"></td>
</tr>
<tr>
<td>Avg. Lap Time:</td>
<td><input
type=text
name=laptime></td>
</tr>
</table>
</form>