When is a number not a number?
I've got some server script that determines the "SELECTED" entry in a SELECT
control. (The code below is a snippet.) If no information is returned then
I want the number defaulted a hard-coded value, otherwise, I want number
that matches the returned value selected. The defaulted, hard-coded value
works but the comparison (i == val) doesn't work if a a value was returned
in the information. I've verified that it is indeed a number within the
range I want.
Why would this comparison fail like this?
TIA
Alan Rosine
<snip>
if (docInfo.advPayMonths == null) || (docInfo.advPayMonths == undefined) ||
isNaN(docInfo.advPayMonths) {
val = 6;
} else {
val = docInfo.advPayMonths;
}
for (i = 1; i <= 12; i++) {
document.write('<OPTION VALUE=' + i);
if (i == val) {
document.write(' SELECTED');
}
document.write('>' + i + '-' + val);
}
<snip>
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0 |
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Alan
8/10/2001 12:44:40 AM
sybase.powersite
2112 articles. 
0 followers.
3 Replies
1586 Views
Try using the eval() JS method
A.
Alan Rosine wrote:
>
> I've got some server script that determines the "SELECTED" entry in a SELECT
> control. (The code below is a snippet.) If no information is returned then
> I want the number defaulted a hard-coded value, otherwise, I want number
> that matches the returned value selected. The defaulted, hard-coded value
> works but the comparison (i == val) doesn't work if a a value was returned
> in the information. I've verified that it is indeed a number within the
> range I want.
>
> Why would this comparison fail like this?
>
> TIA
> Alan Rosine
>
> <snip>
> if (docInfo.advPayMonths == null) || (docInfo.advPayMonths == undefined) ||
> isNaN(docInfo.advPayMonths) {
> val = 6;
> } else {
> val = docInfo.advPayMonths;
> }
>
> for (i = 1; i <= 12; i++) {
> document.write('<OPTION VALUE=' + i);
> if (i == val) {
> document.write(' SELECTED');
> }
> document.write('>' + i + '-' + val);
> }
> <snip>
--
__________________________
Adam Simmonds [TeamSybase]
System Architect
ITS FLEXSIS PROJECT
The University of Sydney
Phone: +61 2 9351 5174
Mobile: +61 403 341 474
Fax: +61 2 9351 7711
|
|
0 |
|
Adam
8/10/2001 3:55:09 AM
Am I not understanding? It seems that the eval() method executes a piece of
code. I'm trying to perform a comparison. The example does show it well
but the if statement is a comparison ( if (i = = val) ) and not an
assignment. I did try using the eval() method but no joy.
Any other suggestions?
TIA
Alan Rosine
"Adam Simmonds [TeamSybase]" <asimmond@mail.usyd.edu.au> wrote in message
news:3B735B1D.3B823FEF@mail.usyd.edu.au...
> Try using the eval() JS method
> A.
>
> Alan Rosine wrote:
> >
> > I've got some server script that determines the "SELECTED" entry in a
SELECT
> > control. (The code below is a snippet.) If no information is returned
then
> > I want the number defaulted a hard-coded value, otherwise, I want number
> > that matches the returned value selected. The defaulted, hard-coded
value
> > works but the comparison (i == val) doesn't work if a a value was
returned
> > in the information. I've verified that it is indeed a number within the
> > range I want.
> >
> > Why would this comparison fail like this?
> >
> > TIA
> > Alan Rosine
> >
> > <snip>
> > if (docInfo.advPayMonths == null) || (docInfo.advPayMonths == undefined)
||
> > isNaN(docInfo.advPayMonths) {
> > val = 6;
> > } else {
> > val = docInfo.advPayMonths;
> > }
> >
> > for (i = 1; i <= 12; i++) {
> > document.write('<OPTION VALUE=' + i);
> > if (i == val) {
> > document.write(' SELECTED');
> > }
> > document.write('>' + i + '-' + val);
> > }
> > <snip>
>
> --
> __________________________
>
> Adam Simmonds [TeamSybase]
> System Architect
> ITS FLEXSIS PROJECT
> The University of Sydney
> Phone: +61 2 9351 5174
> Mobile: +61 403 341 474
> Fax: +61 2 9351 7711
|
|
0 |
|
Alan
8/10/2001 3:43:56 PM
Hi there.=20 I think you should try using parseInt() function. It looks like the i =3D=3D val comparation is not working because val =3D=20 docInfo.advPayMonths is not read as a number, but as a string. parseInt=20 converts the string to an integer. Try this:=20 val =3D parseInt(docInfo.advPayMonths); Also, you can find some info here:=20 http://developer.netscape.com/docs/manuals/communicator/jsref/index.htm (click the index on the left, then use the "find" function of your browser = to find "parseInt"). Please tell me if this works. --- Giannino Alvarez giannino=5Falvarez@mx.sony.com M=E9xico City
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Giannino_Alvarez
11/29/2001 10:37:50 PM
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