What am I doing wrong here. Simple statement. Novice Question.

[Paul]

HI! I get an error with this code.

<SCRIPT language="JavaScript">
If (ifp==""){
ifp="default.htm"}
//--></SCRIPT>

Basicly I want my iframe to have a default page if the user enters in
directly. so I need a way doing this. so I check to see if the ifp value is
null and if so then assign it a value. is this correct?
Thanks in advance :)

Paul

[Joe Fawcett]

"Paul" <pa***********@sympatico.ca> wrote in message
news:uL*******************@news20.bellglobal.com.. .

HI! I get an error with this code.

<SCRIPT language="JavaScript">
If (ifp==""){
ifp="default.htm"}
//--></SCRIPT>

Basicly I want my iframe to have a default page if the user enters in
directly. so I need a way doing this. so I check to see if the ifp value is
null and if so then assign it a value. is this correct?
Thanks in advance :)

Paul

As you don't state the error I may wrong but if, as I expect, it is "object
expected" then it's because you have a capital "I" in "If" which should be
lowercase:

if (ifp == "")
{
ifp = "default.htm";
}

In general all JavaScript keywords start with lowercase letters, built-in
objects such as "String" are one such exception, and usually if two or more
words are concatenated all but the first have an uppercase first letter, e.g
"toLowerCase". An exception to this are the operators such as "typeof".
--
As a side point, although in this instance the syntax is the same, Java and
JavaScript are two different beasts and I suggest restricting your choice of
groups to the relevant ones.

Joe (MVP)

https://mvp.support.microsoft.com/pr...8-8741D22D17A5

[Richard Cornford]

Paul wrote:

<SCRIPT language="JavaScript">
If (ifp==""){
ifp="default.htm"}
//--></SCRIPT> <snip> ... . so I check to see if the ifp
value is null ...

<snip>

The algorithm for the type-converting comparison operator - == - (ECMA
262 3rd edition; section 11.9.3) does not allow any string value
(including the empty string) to equal null. So whatever you are
attempting you are not seeing if ifp is null.

Richard.

[Paul]

HI! thanks, I saw that little one after I posted it. but there is still a
problem. and the other post answered that one.

Do you know of another way to do it. ( other than converting the string and
then back again )?

Thanks in advance :)

Paul
"Joe Fawcett" <jo********@newsgroups.nospam> wrote in message
news:uE**************@tk2msftngp13.phx.gbl...

"Paul" <pa***********@sympatico.ca> wrote in message
news:uL*******************@news20.bellglobal.com.. .

HI! I get an error with this code.

<SCRIPT language="JavaScript">
If (ifp==""){
ifp="default.htm"}
//--></SCRIPT>

Basicly I want my iframe to have a default page if the user enters in
directly. so I need a way doing this. so I check to see if the ifp value
is null and if so then assign it a value. is this correct?
Thanks in advance :)

Paul

As you don't state the error I may wrong but if, as I expect, it is
"object expected" then it's because you have a capital "I" in "If" which
should be lowercase:

if (ifp == "")
{
ifp = "default.htm";
}

In general all JavaScript keywords start with lowercase letters, built-in
objects such as "String" are one such exception, and usually if two or
more words are concatenated all but the first have an uppercase first
letter, e.g "toLowerCase". An exception to this are the operators such as
"typeof".
--
As a side point, although in this instance the syntax is the same, Java
and JavaScript are two different beasts and I suggest restricting your
choice of groups to the relevant ones.

Joe (MVP)

https://mvp.support.microsoft.com/pr...8-8741D22D17A5

[Joe Fawcett]

"Paul" <pa***********@sympatico.ca> wrote in message
news:eh*************@TK2MSFTNGP15.phx.gbl...

HI! thanks, I saw that little one after I posted it. but there is still a
problem. and the other post answered that one.

Do you know of another way to do it. ( other than converting the string and
then back again )?

Thanks in advance :)

Paul

I'm not sure, if you want to test for null or empty string the have:
if (!ifp)
{
//ifp is null or empty
}
--

Joe (MVP)

https://mvp.support.microsoft.com/pr...8-8741D22D17A5

[akarl]

Paul wrote:

HI! I get an error with this code.

<SCRIPT language="JavaScript">
If (ifp==""){
ifp="default.htm"}
//--></SCRIPT>

Basicly I want my iframe to have a default page if the user enters in
directly. so I need a way doing this. so I check to see if the ifp value is
null and if so then assign it a value. is this correct?

comp.lang.javascript

[Trevor L.]

Hmm!

There have been a few posts on this topic (or related), including some I
have taken part in

One spelt out the different between:
a null string, tested by 'if (string == null)'
an empty string, tested by 'if (string == "")'
and
a string comprising a space, tested by 'if (string == " ")'

Your test is for an empty string. Is this what it should be?

You are testing if (ifp == ..). I have not used iframes, so I don't know
whether this is the correct thing to be testing. Others may answer this.

With frames, I use this code
if (parent.location.href == window.location.href)
parent.location.href = "index.html"

I would need to experiment to see what works with iframes. (Maybe I should,
to add to my knowledge !)
--
Cheers,
Trevor L.
Website: http://tandcl.homemail.com.au

akarl wrote:

Paul wrote:

HI! I get an error with this code.

<SCRIPT language="JavaScript">
If (ifp==""){
ifp="default.htm"}
//--></SCRIPT>

Basicly I want my iframe to have a default page if the user enters in
directly. so I need a way doing this. so I check to see if the ifp
value is null and if so then assign it a value. is this correct?

comp.lang.javascript