[RESOLVED] Auto Updating or Dependent Forms

krotkruton

I don't really know how to describe this, but I have two form fields where one is dependent on the other and needs to change if the user selects something from the first field.

I'm just trying to allow for a date selection. I have two drop down menus, month and day, and since the number of days in a month depends on the month, I need the drop down day menu to only list days in the month that is selected. What I want to do is have the drop down day menu change whenever the user picks a month. Kind of like what happens on Nvidia's Driver Select page, only with a drop down menu instead of a list or whatever you would call that. I tried looking at the source code there but couldn't really make much out of it.

I do have a simple switch statement that determines how many days are in the current month, and I plan to use a simple for loop to create the select statements for the day menu. I'm not going to bother posting any of the code because I feel like its pretty obvious and just takes up a lot of space, but if anyone would like to see what I have, I'll put it up.

Any help is appreciated.

harmor

Here's the closest thing I can find
http://www.dynamicdrive.com/dynamicindex16/chainedselects/index.htm

bretticus

This is a javascript thing really. Personally I think it's annoying to have to have the whole page reload for every select onchange event.

Therefore, I suggest (this one isn't very detailed and off the top of my head) storing month ranges in clientside script and dynamically building a date drop down...or better...

For the onchange event call a function that parses the date and alerts that the date is invalid...or better...

check the date via checkdate serverside (after posting the form...annoying also but rare that someone enters feb 31st, ect.) ...or better...

Find yourself a good client side calendar script.

Here's one that I've used from totallysmartit

Good luck!

krotkruton

harmor: the closest thing you could find was exactly what I wanted. Thanks a lot.

bretticus: I was already toying with the idea of making a calendar as well, mainly because I don't think that most people know whether next Friday is the 24, 25, or 26. Some people probably don't know whether next Friday is still in November or not. That calendar script should help me get on my way with that idea. Thanks to you too.