Adding Another Select Option In Form?

Mar 31, 2010

I'm making a form with some select options, and when clicking an option from the drop down, another option will appear.

The thing is that it seems to work in the most common browsers, but for myself, as a beginner in Javascript, I don't know if it's written the correct way. What could be done better?

Aswel, before I write further to this part of code, I want to know that the value of the second option will pass correctly via the PHP process script afterwards... because initially, the second option is not mentioned in the .html file, it comes in virtually by the javascript.

Html:

Code HTML4Strict:
<form action="link-to-php-process-script" method="post">
<p>
<label for="blabla">Choose: </label>
<select name="blabla" id="choice">

[Code]....

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Adding OPTION To SELECT Using AppendChild

Aug 23, 2006

For some reason this doesnt work in IE.

var oSelect = document.createElement('select');
oSelect.name = 'Year[]'
for (var i=1950; i<=2005; i++)
{
var oOption = document.createElement("option");
oOption.text = i;
oOption.value = i;
oSelect.appendChild(oOption);
}

oSelect.add(oOption); works in IE but doesnt in FF. Although, its mentioned here that appendChild applies to OPTION too. How do I get this working on both browsers ?

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Aug 3, 2010

I have an interesting issue. I use an old, CSS-style tabbed page that sets a style on a <div> containing an <iframe> to display:block if the tab is clicked, and display:none if the tab is not currently selected. This works fine and is not the issue, just background information....In one of the pages that is currently set to display:none, I remove all the options and add new ones based on a data return from an ajax query. If I do this in a more traditional direct DOM manipulating Javascript fashion, everything is OK and the select remains unseen. However, doing this using jQuery causes the select to appear and bleed-through to the <iframe> content that is currently visible.

document.forms[0].test_select.options.length = 0;
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Dec 21, 2005

I'm currently working with a bit of javascript to dynamically add
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Explorer, however in Firefox the dropdown only displays the first
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Here is the code;

//ar_options is an array with the option to be displayed in.

for (count=0; count<number_of_options+1; count++)
{
document.forms['enquiry'].enquirytype.options[count] = new
Option(ar_options[count],ar_options[count]);
};

As I said - fine in Internet Explorer, but not in Firefox. I did
discover some discussions about this, which were talking about an issue
and workarounds but I couldn't get any of them to work. I have also
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Feb 5, 2006

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Code:

<head>
function signup (frm)
{[code]....

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[code]....

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Mar 9, 2009

I am building a form with ColdFusion, HTML, and will be using some Javascript, and I wnt the javascript to tell one form object to display itself when a certain option is chosen from a <select> tag.

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SELECT * FROM categories WHERE type = 'cat' ORDER BY id
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</tr><tr>
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<option value=" "></option>
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<head>
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[Code]...

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[Code]...

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[Code]...

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<SCRIPT LANGUAGE="JavaScript"'>
<!--
function validateForm(){[code]....

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[Code]....

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[code]...

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Code:

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