select.add(v)

[gert cuykens]

How does select.add() work ?

Error: uncaught exception: [Exception... "Not enough arguments [nsIDOMHTMLSelectElement.add]" nsresult: "0x80570001 (NS_ERROR_XPC_NOT_ENOUGH_ARGS)" location: "JS frame :: http://localhost/gert/db4/js/html.js :: op :: line 23" data: no]

select.add(v)

Error: uncaught exception: [Exception... "Could not convert JavaScript argument - 0 was passed, expected object. Did you mean null? arg 0 [nsIDOMHTMLSelectElement.add]" nsresult: "0x80570035 (NS_ERROR_XPC_BAD_CONVERT_JS_ZERO_ISNOT_NULL)" location: "JS frame :: http://localhost/gert/db4/js/html.js :: op :: line 23" data: no]

select.add(0,v)

[gert cuykens]

function op(n,v)
{
i = document.getElementsByName(n)[0].options.length
option = document.createElement('option')
option.value = v
option.text = v
document.getElementsByName(n)[0].add(option,i)
}

also doesnt work

[gert cuykens]

function op(n,v)
{
i = document.getElementsByName(n)[0].options.length
option = document.createElement('option')
option.value = v
option.text = v
document.getElementsByName(n)[0].options.add(option,i)
}

But this does

[Ultimater]

A few notes.
1. Should really be using: new Option("text","value") not createElement and spam 3 extra lines.
2. getElementsByName is glitchy in IE.
3. If you want to append a new OPTION to the end of a SELECT dropdown menu, instead of counting all the OPTIONS there are and sending that number as a 2nd argument to the "add" method, just send it null instead.

function op(n,v)
{
document.getElementsByName(n)[0].options.add(new Option(v,v),null);
}

However remember what I said about getElementsByName being glitchy in IE.
Besides, it's better to make sure the element actually exists before calling the function and instead sending it a reference.

function op(e,v)
{
e.options.add(new Option(v,v),null);
}

Seeing the code is so short now, maybe it's better to just avoid the function altogether.

Then again, I tend to avoid the "add" and "remove" methods myself.

e.options[e.options.length]=new Option("text","value");

[gert cuykens]

Makes me wonder how many other spam lines i have in my code lol