IE and Netscape Difference: ASP/JavaScript Problem

#1 July 23rd, 2005, 05:34 PM

Why won't Netscape do the intended in the following? IE is able to
render this page as intended. It is is a "self-posting" ASP form with a
JavaScript validation function: if the form fails the JavaScript
validation function, then the form should not post and an alert should
be issued as indicated below.

The *first* alert in the Validate function works in NS, but the rest of
the code does not and therefore I wonder about the way I am referencing
the controls...tried to experiment with this, as can be seen in the
rem'd out code. Tried to research in my books...

Thanks for any and all! Jules

---------------------------------------------------------------------------------------------------------------
<%Option Explicit%>

<%
'This is a self-posting form: the same form is used for both
'the request and response objects

If not IsEmpty(request.Form("txtFirstName")) and _
Not IsEmpty(Request.Form("txtLastName")) then
'the form has been filled out and a brief thank you is sent
%>
<html>
<head>
<title>Thank You</title>

</head>

<body>
Thank you
<br><%=Request.Form("txtFirstName")%>&nbsp<%=Reque st.Form("txtLastName")%>
for your information.
Have a nice day!
</body>
</html>

<%Else%>


<html>
<head>
<script language="javascript">

function trim(strField){
alert("trim");
return strField.replace(/^\s+/,'').replace(/\s+$/,'')
}

function validate()
{
alert("validate");

//if(document.all.txtFirstName.value == "" ||
document.all.txtLastName.value == "")
if(trim(document.forms("frmInfo").elements("txtFir stName").value) ==
"" || trim(document.forms("frmInfo").elements("txtLastNa me").value) ==
"")
//document.swOrder.elements[0].value
//if(trim(document.frmInfo.elements[0].value == "" ||
trim(document.frmInfo.elements[1].value) == "")
{
document.frmInfo.reset();
alert("Please enter both first and last names.");
return false;
}
document.frmInfo.submit();
return true;
}
</script>
<title>Thank You</title>
</head>
<body>
Please fill out this form:
<form name="frmInfo" action="AllControls.asp" method="post">

First Name: <input type="text" name="txtFirstName"><br>
Last Name: <input type="text" name="txtLastName"><br>
<input type="Button" value="Submit User Info" onclick="validate()">
<input type="reset">

</form>
</body>
</html>
<%End if %>

#2 July 23rd, 2005, 05:34 PM

JJ_377@hotmail.com wrote:
<snip>[color=blue]
> The *first* alert in the Validate function works in NS,
> but the rest of the code does not and therefore I wonder
> about the way I am referencing the controls...[/color]
<snip>

Why wonder, Netscape/Gecko browsers provide very explicit error reports
in their javascript console?

<script language="javascript">

The language attribute is deprecated and the type attribute is required
in valid HTML 4. So:-

<script type="text/javascript">

<snip>[color=blue]
> document.all.txtLastName.value == "")[/color]

Only the very latest Mozilla/Gecko browsers support - document.all - so
that does not include any Netscape releases.
[color=blue]
> if(trim(document.forms("frmInfo").[/color]

The - document.forms - collection is (W3C) specified as an object not a
function. As such its members should be referenced using bracket
notation.
[color=blue]
>elements("txtFirstName").value) ==[/color]
<snip>

The - elements - collection of form elements is (W3C) specified as an
object not a function. As such its members should be referenced using
bracket notation.

Netscape browsers will not have made it past those two errors.

Richard.

#3 July 23rd, 2005, 05:34 PM

Richard Cornford wrote:[color=blue]
> JJ_377@hotmail.com wrote:[/color]
[color=blue]
> <snip>
>[color=green]
>>document.all.txtLastName.value == "")[/color]
>
>
> Only the very latest Mozilla/Gecko browsers support - document.all - so
> that does not include any Netscape releases.
>[/color]

IMO, you should say "have limited support for". An informative
discussion on Mozilla/Geko support for document.all is here:

<URL:https://bugzilla.mozilla.org/show_bug.cgi?id=248549>

Mozilla/Geko's support for document.all seems limited to the
ability to create a reference to an element and that's it.

--
Rob

#4 July 23rd, 2005, 05:34 PM

I tried the JavaScript Console before posting my initial question and
it returned no messages at all and so I posted my inquiry here. I tried
to change the <script> tag and the script still fails...if the control
references are incorrect, how do I correct them? I tried various ways
of using "bracket notation" as well before posting my first inquiry
(rem'd out code in original posting I believe) and did not get the
script to work. If this line is wrong, how is it to be changed to to
bracket notation so that it works in NS?
if(trim(document.forms("frmInfo").elements("txtFir stName").value) ==
"" || trim(document.forms("frmInfo").elements("txtLastNa me").value) ==
"")
?
Thank you.

#5 July 23rd, 2005, 05:34 PM

Got it!
if(trim(document.frmInfo.txtFirstName.value) == "" ||
trim(document.frmInfo.txtLastName.value) == "")

This works in Netscape and IE.

IE and Netscape Difference: ASP/JavaScript Problem

Popular Articles

What is Bytes?