Ignore something in Javascript

[Vandana Rola]

Hello Everyone,

I posted this question earlier under creating Multiple choice quiz. Is
it possible to ignore something using javascript. What I am trying to
do is creating a multiple answer quiz. I have five choices out of
which user are supposed to choose 3 best choices. The user should get
feedback on the choices they make. I have been able to provide the
feedback for all the choices but my problem is I am also getting the
feedback on the unchecked answers. Is there any way to tell javascript
not to check unchecked answers.

I have used the following code to accomplish this:

function check(f,key){
var newhtml="";
key=key.replace(/^.*0/,"").substr(0,5);
for(var i=0;i<key.length;i++) {
if ((key.charAt(i)<"5")==f.elements[i].checked)
{
newhtml+= question.a[i] + "<br>Right.<br>";
}
else if ((key.charAt(i)>"5")==f.elements[i].checked)
{
newhtml+= question.a[i] + " <br>Wrong.<br>";

} else {return};
}
document.getElementById("tablet").innerHTML= newhtml;

Could anyone help me with what's wrong with this code. Any help would
be appreciated.

Thanks

[Ivo]

"Vandana Rola" wrote

I posted this question earlier under creating Multiple choice quiz. Is
it possible to ignore something using javascript. What I am trying to
do is creating a multiple answer quiz. I have five choices out of
which user are supposed to choose 3 best choices. The user should get
feedback on the choices they make. I have been able to provide the
feedback for all the choices but my problem is I am also getting the
feedback on the unchecked answers. Is there any way to tell javascript
not to check unchecked answers.

I have used the following code to accomplish this:

function check(f,key){
var newhtml="";
key=key.replace(/^.*0/,"").substr(0,5);
for(var i=0;i<key.length;i++) {
if ((key.charAt(i)<"5")==f.elements[i].checked)
{
newhtml+= question.a[i] + "<br>Right.<br>";
}
else if ((key.charAt(i)>"5")==f.elements[i].checked)
{
newhtml+= question.a[i] + " <br>Wrong.<br>";
Add two slashes in front the above line, and javascript will ignore it.
// newhtml+= question.a[i] + " <br>Wrong.<br>";

If this is not what you had in mind, post some more code or preferably an
url so we can get an idea of what actually happens and what exactly should
not happen.
Maybe you mean that if f.elements[i] is not checked, the loop should just
continue. In that case, put this after the for(var i... line:
if( ! f.elements[i].checked) continue;

HTH
Ivo
} else {return};
}
document.getElementById("tablet").innerHTML= newhtml;

Could anyone help me with what's wrong with this code. Any help would
be appreciated.

Thanks

[Lee]

Vandana Rola said:

Hello Everyone,

I posted this question earlier under creating Multiple choice quiz. Is
it possible to ignore something using javascript. What I am trying to
do is creating a multiple answer quiz. I have five choices out of
which user are supposed to choose 3 best choices. The user should get
feedback on the choices they make. I have been able to provide the
feedback for all the choices but my problem is I am also getting the
feedback on the unchecked answers. Is there any way to tell javascript
not to check unchecked answers.

I have used the following code to accomplish this:

function check(f,key){
var newhtml="";
key=key.replace(/^.*0/,"").substr(0,5);
for(var i=0;i<key.length;i++) {
if ((key.charAt(i)<"5")==f.elements[i].checked)
{
newhtml+= question.a[i] + "<br>Right.<br>";
}
else if ((key.charAt(i)>"5")==f.elements[i].checked)

Change that last line to simply:
else

[Thomas 'PointedEars' Lahn]

Vandana Rola wrote:

I posted this question earlier under creating Multiple choice quiz. Is
it possible to ignore something using javascript.
Is this a question.
[...] Is there any way to tell javascript not to check unchecked answers.
// if checkbox is checked
if (referenceToCheckBox.checked)
{
...
}
I have used the following code to accomplish this:

function check(f,key){
var newhtml="";
key=key.replace(/^.*0/,"").substr(0,5);
for(var i=0;i<key.length;i++) {
if ((key.charAt(i)<"5")==f.elements[i].checked)
{
newhtml+= question.a[i] + "<br>Right.<br>";
}
else if ((key.charAt(i)>"5")==f.elements[i].checked)
{
newhtml+= question.a[i] + " <br>Wrong.<br>";

} else {return};
}
document.getElementById("tablet").innerHTML= newhtml;

The check() method is AFAIS syntactically correct (yet the indentation and
spacing -- the Pretty Printing -- has potential for improvement) but I do
not see a line where the check() method is called and you have not provided
sufficient information of the data it is operating on. Besides, you are
mixing DOM Level 1+ (getElementById()) and proprietary DOM (innerHTML)
without testing which is error-prone:

<http://pointedears.de/scripts/test/whatami>
HTH

PointedEars

[Randy Webb]

Thomas 'PointedEars' Lahn wrote:

Vandana Rola wrote:

I posted this question earlier under creating Multiple choice quiz. Is
it possible to ignore something using javascript.

Is this a question.

[...] Is there any way to tell javascript not to check unchecked answers.

// if checkbox is checked
if (referenceToCheckBox.checked)
{
...
}

I have used the following code to accomplish this:

function check(f,key){
var newhtml="";
key=key.replace(/^.*0/,"").substr(0,5);
for(var i=0;i<key.length;i++) {
if ((key.charAt(i)<"5")==f.elements[i].checked)
{
newhtml+= question.a[i] + "<br>Right.<br>";
}
else if ((key.charAt(i)>"5")==f.elements[i].checked)
{
newhtml+= question.a[i] + " <br>Wrong.<br>";

} else {return};
}
document.getElementById("tablet").innerHTML= newhtml;

The check() method is AFAIS syntactically correct (yet the indentation and
spacing -- the Pretty Printing -- has potential for improvement) but I do
not see a line where the check() method is called and you have not provided
sufficient information of the data it is operating on. Besides, you are
mixing DOM Level 1+ (getElementById()) and proprietary DOM (innerHTML)
without testing which is error-prone:

<http://pointedears.de/scripts/test/whatami>

Could you *please* explain, in your own warped world of thinking, how
getElementById and innerHTML have *ANY* thing to do with whats on the
page you reference? Which is browser detection based on userAgent strings?

[Thomas 'PointedEars' Lahn]

Randy Webb wrote:

Thomas 'PointedEars' Lahn wrote:

<http://pointedears.de/scripts/test/whatami>

Could you *please* explain, in your own warped world of thinking, how
getElementById and innerHTML have *ANY* thing to do with whats on the
page you reference? Which is browser detection based on userAgent strings?

If you would have read it thoroughly, you would have known that it in fact
deals with differences in client-side object models and explains why those
cannot be covered with testing HTTP headers (or properties reflecting them)
or buzzword objects but only with feature tests prior to access.
PointedEars

[Randy Webb]

In a message inscribed eternally in the scrolls of comp.lang.javascript
Thomas 'PointedEars' Lahn wrote incesantly about:

Randy Webb wrote:

Thomas 'PointedEars' Lahn wrote:

<http://pointedears.de/scripts/test/whatami>

Could you *please* explain, in your own warped world of thinking, how
getElementById and innerHTML have *ANY* thing to do with whats on the
page you reference? Which is browser detection based on userAgent strings?

If you would have read it thoroughly, you would have known that it in fact
deals with differences in client-side object models and explains why those
cannot be covered with testing HTTP headers (or properties reflecting them)
or buzzword objects but only with feature tests prior to access.

That is fine and dandy, but it doesn't answer the question. If the page
is about Object Detection, then you need to reconsider its layout and
explanations. It covers, mostly, the userAgent string and its flaws.

P.S. You still haven't accepted/denied my challenge to you about
accessing a page with anything but NS6.

--
Randy