Creating list menus dynamically...

[Nick]

Id like to create some list menus dynamically. The problem is that id
like the option text to be different from the option values. For
example...

<script language=JavaScript>
city[0] = 'Los Angeles';
city[1] = 'New York';
city[2] = 'San Francisco';
city[3] = 'London';
city[4] = 'Paris';
function createCities() {
for (i=0;i < city.length;i++) {
document.form.city.options = new Option(city);
}
}
</script>

This creates options...
<option value="Los Angeles">Los Angeles</option>
<option value="New York">New York</option>
<option value="San Francisco">San Francisco</option>
<option value="London">Lodon</option>
<option value="Paris">Paris</option>

Instead id like it to be...
<option value="0">Los Angeles</option>
<option value="1">New York</option>
<option value="2">San Francisco</option>
<option value="3">Lodon</option>
<option value="4">Paris</option>

How can I do this? -Nick

 

[Martin Honnen]

Nick wrote:

document.form.city.options = new Option(city);

This creates options...
<option value="Los Angeles">Los Angeles</option>

Instead id like it to be...
<option value="0">Los Angeles</option>

Use
new Option(text, value)

 

[Grant Wagner]

Id like to create some list menus dynamically. The problem is that id
like the option text to be different from the option values. For
example...

<script language=JavaScript>
city[0] = 'Los Angeles';
city[1] = 'New York';
city[2] = 'San Francisco';
city[3] = 'London';
city[4] = 'Paris';
function createCities() {
for (i=0;i < city.length;i++) {
document.form.city.options = new Option(city);
}
}
</script>

This creates options...
<option value="Los Angeles">Los Angeles</option>
<option value="New York">New York</option>
<option value="San Francisco">San Francisco</option>
<option value="London">Lodon</option>
<option value="Paris">Paris</option>

Instead id like it to be...
<option value="0">Los Angeles</option>
<option value="1">New York</option>
<option value="2">San Francisco</option>
<option value="3">Lodon</option>
<option value="4">Paris</option>

How can I do this? -Nick

Read the documention for the Option object, you'll see that it takes four
parameters, not one. Use:

new Option(city, i, false, false);

<url:
http://devedge.netscape.com/library/manuals/2000/javascript/1.3/reference/option.html
/>
<url: http://www.devguru.com/Technologies/ecmascript/quickref/option.html
/> (although their documentation is a bit outdated, recommending calling
history.go(0) after populating a <select> programmatically)

 

[Mick White]

Id like to create some list menus dynamically. The problem is that id
like the option text to be different from the option values. For
example...

<script language=JavaScript>
city[0] = 'Los Angeles';
city[1] = 'New York';
city[2] = 'San Francisco';
city[3] = 'London';
city[4] = 'Paris';
function createCities() {
for (i=0;i < city.length;i++) {
document.form.city.options = new Option(city);
}
}
</script>

This creates options...
<option value="Los Angeles">Los Angeles</option>
<option value="New York">New York</option>
<option value="San Francisco">San Francisco</option>
<option value="London">Lodon</option>
<option value="Paris">Paris</option>

Instead id like it to be...
<option value="0">Los Angeles</option>
<option value="1">New York</option>
<option value="2">San Francisco</option>
<option value="3">Lodon</option>
<option value="4">Paris</option>

How can I do this? -Nick

Others have given you good advice, I would do something like below.

<script type="text/javascript">
city = ['Los Angeles','New York','San Francisco','London','Paris'];
function createCities() {
c= city.length,d=document.formName.city;d.length=0;
for (var i=0;i < c;i++) {
d.options = new Option(city,i);
}
}
</script>

Mick

 

[Blue Raja]

Read the documention for the Option object, you'll see that it takes four
parameters, not one. Use:

new Option(city, i, false, false);

<url:
http://devedge.netscape.com/library/manuals/2000/javascript/1.3/reference/option.html
/>
<url: http://www.devguru.com/Technologies/ecmascript/quickref/option.html
/> (although their documentation is a bit outdated, recommending calling
history.go(0) after populating a <select> programmatically)

Both of these say "new Option([text[, value[, defaultSelected[,
selected]]]])" meaning 0-4 parameters, not 4 only.

 

[Grant Wagner]

Read the documention for the Option object, you'll see that it takes four
parameters, not one. Use:

new Option(city, i, false, false);

<url:
http://devedge.netscape.com/library/manuals/2000/javascript/1.3/reference/option.html
/>
<url: http://www.devguru.com/Technologies/ecmascript/quickref/option.html
/> (although their documentation is a bit outdated, recommending calling
history.go(0) after populating a <select> programmatically)

Both of these say "new Option([text[, value[, defaultSelected[,
selected]]]])" meaning 0-4 parameters, not 4 only.

Where did I say it takes "4 only"?

The intent was clear, if the language wasn't. The Option object contructor takes
additional parameters which allow you to control both the text and value attributes (as
well as the selected and defaultSelected properties).

But points to you for pointing out the obvious, lead by documentation which I included a
link to... way to go, you're a hero.

 

[Blue Raja]

Read the documention for the Option object, you'll see that it takes four
parameters, not one. Use:

new Option(city, i, false, false);

<url:

http://devedge.netscape.com/library/manuals/2000/javascript/1.3/reference/option.html

/>
<url: http://www.devguru.com/Technologies/ecmascript/quickref/option.html
/> (although their documentation is a bit outdated, recommending calling
history.go(0) after populating a <select> programmatically)

Both of these say "new Option([text[, value[, defaultSelected[,
selected]]]])" meaning 0-4 parameters, not 4 only.

Where did I say it takes "4 only"?

"...Takes four parameters, not one" implies "4 only". Also, your tone
denoted that you were correcting a mistake.

The intent was clear,

As was mine, i.e. providing IMO helpful advice to what seemed to be a minor
oversight.

Done with your hissy-fit now?