Javascript html option selectedindex

At the time, I felt this was quite poor so I set about finding a solution. For the impatient among us, you can step straight to implementing it if you want. The solution to this problem is comprised of two parts. Firstly, knowing when you make a selection or change the current selection. Secondly, keeping track of the current selection, so you can revert to it in case the user selects a disabled option in the list. If those two things can be achived, then we can emulate the disabled attribute on an option element.

Part 1 You can get around not having an onclick event against the option element by using an onchange event against the select.

This is taken care of, we can move on.

Generally, the first tool in the chest that most people reach for in this case is an onclick event. Thankfully, the onfocus event is our savior.

First thing is making sure that the code only executes on the correct browsers. You could use browser sniffing techniques or proprietary JavaScript functions to isolate IE, however that can be inconsistent. In case you are unfamiliar with them, a conditional comment looks like a standard HTML comment to every non-IE browser; however IE interprets them and allows the author very simple conditional testing.

If you do, it iterates through them, attaching an onchange and an onfocus event to each one. At the same time, the disabled option elements if there are any are also highlighted with the disabled text colour. At this point, you have nothing else to do.

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The onload event and the two functions will do everything for you from this point. The one caveat is if you are manipulating the disabled attributes on the options through the DOM.

To make this work, an event and two functions are used. They are listed here so you can glance over them:. The restore function returns the selected item to its previous selection, if the newly selected item is disabled. The colours used on lines 4 and 7 are CSS2 colour names, which are considered system colours. System colours reflect what your current computer settings are, so they should change with your current desktop theme at least that is my interpretation of it.

Using this script is meant to be as simple as possible.

All you have to do is download the external JavaScript file. Upload it to your site and place a single conditional comment in your HTML, such as:.

There are also two examples of how the script functions as well, morgan stanley stock broker trainee but they demonstrate it none the less.

After this post being active earn money recycling bottles over a year now, it continues to draw in consistent traffic from around the internet. Even though this was a proof of concept and not a complete solution, it has saved many people a lot of time. Plenty of javascript html option selectedindex have taken the basic idea I started with and stock market amritsar it, which I think is nifty option chain price. Recently, a couple of people have sent through comprehensive techniques which are either built on my initial work in some way or inspired by it.

These solutions are out perform my simple proof of concept, so they are definitely worth noting for everyone to use:. Both of the above examples are excellent, so you should pick which ever you feel is best going to suit your needs. Please can someone shed light on the solution. Thanks and kudos to you, Alistair, and shame on you, Microsoft. The reason IE does not implement it is the Internet Explorer is not an Internet Explorer implementation — it uses the Microsoft Windows listbox element.

HTML DOM Option value Property

I wonder if I should already put in [if lt IE 42] or something like that…. Alistair Lattimore The day to day goings on of our family Menu Skip to content Home Photos Archives Projects About Contact.

Select, Option, Disabled And The JavaScript Solution July 1, InternetProgramming Alistair Lattimore. Successful Ideas The solution to this problem is comprised of two parts.

How to get the value of a form element : Drop downs and lists

If those two things can be achived, then we can emulate the disabled attribute on an option element Part 1 You can get around not having an onclick event against the option element by using an onchange event against the select.

How It Works First thing is making sure that the code only executes on the correct browsers. The JavaScript To make this work, an event and two functions are used.

They are listed here so you can glance over them: Upload it to your site and place a single conditional comment in your HTML, such as: HTML html4, quirk mode html4, compliant mode xhtml1. These solutions are out perform my simple proof of concept, so they are definitely worth noting for everyone to use: Apptaro created an elegant solution using a DHTML Behaviour file. These behaviour files only execute in Internet Explorer which is a great way isolating it from interfering with other web browsers.

Kaleb Walton has implemented a JavaScript object oriented version of my proof of concept. September 2, at 8: November 11, at 5: May 11, at May 19, at February 17, at 7: March 19, at 8: March 26, at 4: Thank you for the work, way back when. March 29, at 1: I wonder if I should already put in [if lt IE 42] or something like that… Thanks for sharing this!