I guess the question is also how does a function remember what it has done before, when it is called again? Hi all, I have been struggling on a bit of code for a while now.
I need to populate a second drop down list Region based upon the selection of the first County. I have found a piece of code that works on its own and have adapted to suit my needs - see below. However, when I drop it into my main page the javascript is not working. It's because of the formObject but I just don't know enough to resolve this!
Furthermore, I need the textboxes the user has already completed in the form to retain their value once the javascript kicks in as the completed form will submit to a database. This piece of code is working well. Thanks in advance for your help.
It probably would be more appropriate here as there is much Javascript involved Hello, I am trying to construct a Jukebox for my website. I have spent considerable time all over the WEB and at this forum which addressed the issue in a 50 page thread.
These are my main two questions for everything below: 1. How can I have the Jukebox cycle through all tunes and then start over from the beginning? Then as in 1, start over from the beginning? Per this thread I came away with basically two ways to assemble the jukebox. One uses links in a drop down list which the user can choose from. The other is to use an. Below, I have included the code for each Jukebox. To see the Jukeboxes in action please go to my website where I have posted some test pages exhibiting the jukeboxes that I am referring to.
The following is the Jukebox which utilizes an. If I end up using this idea I would like the tunes in the. Then have the list play to the end of all tunes in the list. Then start over from the beginning of the list. After this code is the. If I go with this idea, I would like for the list not to be a dropdown list but just a list of tunes.
The user should be able to click on any tune in the list and the player should start from that point, play all the remaining tunes in the list and then start from the beginning. The good thing about it is that it lists all the tunes in the playlist which the user can then select from.
An example of this is shown below:. We provide a Go button for the list, but only show it if JavaScript is not present:. Sign in Email. Forgot your password? Search within: Articles Quick Answers Messages. Tagged as Javascript. Stats 1. Using JavaScript to handle drop-down list selections.
Chris Maunder Rate me:. Please Sign up or sign in to vote. A simple method of making dropdown lists automatically navigate to a new page when a new selection is made. Download source files - 1 Kb Introduction We've all seen sites that feature drop down lists that automatically take you to your selection without you needing to make the cumbersome and lengthy step of hitting a "Go" button. What on Earth am I talking about? Picture a drop down list as follows: We often see a button next to the list that the user should press in order to actually activate there selection: The user selects the value from the dropdown, hits Go, and the choice is made.
How do we do it? A typical dropdown list is instantiated using the following: ASP. Copy Code. Chris Maunder. Founder CodeProject. He is also co-founder of Developer Media and ContentLab. He's been programming since the 80's and has been, in various guides, an astrophysicist, bacyard mechanic, mathematician, physicist, breeder of carnivorous plants, hydrologist, geomorphologist, defence intelligence researcher and then, when all that got a bit rough on the nerves, a web developer.
He is kind to small animals and has a soft spot for cheesecake. Chris was born and bred in Australia but splits his time between Toronto and Melbourne, depending on the weather.
For relaxation he is obsessively into road cycling, physiology, occasionally snowboarding and rock climbing, and wishes he were a storm chaser. Please pay attention to the. These are used to define the layout for the dropdown container component as well as its inner elements, such as the.
Basically, there are 3 actions that take place depending on what the user interaction is, as their listeners are added to the DOM elements:. When the dropdown element is clicked, it opens if it is closed or closes if it is opened.
This happens by binding toggleMenuDisplay to the click event listener on the dropdown element. Now try to console. What happens? Comment out the first option and try again. We get both the value and text with javascript. We should make our dropdown dynamic since JavaScript is designed to react for changes in your page.
With that in mind we will assign an eventListener to our fruit element. With our eventListener we are listening for a change in our dropdown. Note how you can also get the value of the selected option by doing e. Now you can select any fruit option and JavaScript is reacting to changes in our dropdown and updating our h2 accordingly. Very fruitful right! Getting dropdown values is a crucial skill as you learn web development.
With JavaScript we can get such values in no time. About us: Career Karma is a platform designed to help job seekers find, research, and connect with job training programs to advance their careers.
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