I have an HTML form which includes a combo box with 4 options, which is used
to select a method of contact (phone, email etc...). If the user selects an
invalid option (for example, they have selected phone, but have not supplied
a phone number) an alert box pops up. How do I reset the combo box so it
displays the first option in the combo box (which is the default)??
Many thanks in advance.
4  9118 
"Richard Haygreen" <rj***@kent.ac. uk> wrote in message
news:cj******** **@athena.ukc.a c.uk... I have an HTML form which includes a combo box with 4 options, which is
used to select a method of contact (phone, email etc...). If the user selects
an invalid option (for example, they have selected phone, but have not
supplied a phone number) an alert box pops up. How do I reset the combo box so it
displays the first option in the combo box (which is the default)??
Many thanks in advance.
document.{form_ name}.{select_n ame}.selectedIn dex = -1;
For example, watch for word-wrap.
<html>
<head>
<title>selreset .htm</title>
<script type="text/javascript">
function selected(that) {
var form1 = document.form1;
// substitute your validation below.
if (1==1) {
alert("Invalid selection!");
that.selectedIn dex = -1;
}
}
</script>
</head>
<body>
<form name="form1">
<select name="ContactMe thod"
onchange="selec ted(this)">
<option>
<option>Phone
<option>Email
<option>Pager
<option>Other
</select>
</form>
</body>
</html>
On Fri, 01 Oct 2004 15:01:30 GMT, McKirahan <Ne**@McKirahan .com> wrote: "Richard Haygreen" <rj***@kent.ac. uk> wrote in message
news:cj******** **@athena.ukc.a c.uk...
How do I reset the combo box so it displays the first option in the
combo box (which is the default)??
[snip]
document.{form_ name}.{select_n ame}.selectedIn dex = -1;
The OP asked for the first option. That removes any selection.
document.forms['formName'].elements['elementName'].selectedIndex = 0;
[snip]
Mike
--
Michael Winter
Replace ".invalid" with ".uk" to reply by e-mail.
Richard Haygreen wrote: I have an HTML form which includes a combo box with 4 options, which is used
to select a method of contact (phone, email etc...). If the user selects an
invalid option (for example, they have selected phone, but have not supplied
a phone number) an alert box pops up. How do I reset the combo box so it
displays the first option in the combo box (which is the default)??
Many thanks in advance.
I would think carefully about re-setting it. If the user's input fails
validation, you are going to clear their selection and (presumably)
whatever they typed in. So as punishment for maybe one bad keystroke,
they now have to re-select (say) e-mail and type in maybe 15 characters
all over again.
Maybe what you are doing is fine, but just think about it from your
users' perspective.
Cheers, Fred.
> I would think carefully about re-setting it. If the user's input fails validation, you are going to clear their selection and (presumably)
whatever they typed in. So as punishment for maybe one bad keystroke,
they now have to re-select (say) e-mail and type in maybe 15 characters
all over again.
Maybe what you are doing is fine, but just think about it from your users'
perspective.
Cheers, Fred.
Yes, I would agree with you, my intention is not to punish the user, but to
force them to make a selection. If they select phone, and have not entered a
phone number I want to reset the combo box; leaving them two choices: select
a different option or enter a phone number. At the moment the page tells the
user they have errored, but does nothing about it. I am trying to build in a
fail safe.
Many thanks for all your help. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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