Remove items from a combobox

[SM]

Hello,
Im creating a combobox using the Javascript and the DOM.

If the combobox exists, i don't want to create another one. I want to
empty all the values and put new values.

I was able to create the combox and create the lines of code that
deletes the values in the combobox (well almost)

I just need help finishing my function

Thanks
Marco

function show_catalog()
{
...
if (???combobox doesnt exist, create one)
{
form = document.create Element("form") ;

selectElem = document.create Element("select ");
selectElem.setA ttribute("name" , "video");
selectElem.setA ttribute("size" , "1");

form.appendChil d(selectElem);
...
}

else //empty existing one
{
while(???.optio ns.length) {
???.remove(0);
}
}
//ok now fill the newly created combobox or the existing one now
empty
for (var x in catalog)
{
optionElem = document.create Element('option ');
optionElem.setA ttribute('value ', i);

optionElemValue = document.create TextNode(x);
optionElem.appe ndChild(optionE lemValue)

selectElem.appe ndChild(optionE lem);
}

}
The first time, its always going to be empty, therefore its going to
create one (that the reference i will use to empty it when i click)

[RobG]

On May 26, 7:00 pm, SM <servandomont.. [e-mail] e:

Hello,
Im creating a combobox using the Javascript and the DOM.

If the combobox exists, i don't want to create another one. I want to
empty all the values and put new values.

I was able to create the combox and create the lines of code that
deletes the values in the combobox (well almost)

I just need help finishing my function

Thanks
Marco

function show_catalog()
{
...
if (???combobox doesnt exist, create one)
{
form = document.create Element("form") ;

selectElem = document.create Element("select ");
selectElem.setA ttribute("name" , "video");
selectElem.setA ttribute("size" , "1");

form.appendChil d(selectElem);
...
}

else //empty existing one
{
while(???.optio ns.length) {
???.remove(0);
}

Replace the above with:

} else {
selectElem.opti ons.length = 0;

}

//ok now fill the newly created combobox or the existing one now
empty
for (var x in catalog)
{
optionElem = document.create Element('option ');
optionElem.setA ttribute('value ', i);

optionElemValue = document.create TextNode(x);
optionElem.appe ndChild(optionE lemValue)

selectElem.appe ndChild(optionE lem);

Replace the above with:

selectElem.opti ons[selectElem.opti ons.length] =
new Option(optText, optValue);
--
Rob