JavaScript Drop Down With PHP

earthlingzed

I am having the darndest time with a very simple problem.

I have an HTML form with billing info that needs to be populated with the user's shipping info when a check box is set. The data is stored in a PHP session and I am able to populate all form fields (text fields) just fine using some JavaScript that has the session values written into it with PHP. My problem is that I have an HTML drop down menu with states in it that I am unable to change to the user's state selection. This is actually a JavaScript question, but I hope someone can help just the same. Here is the line of JavaScript that should be making the dropdown menu change:

var i = document.billingform.b_state.selectedIndex; document.billingform.b_state.options.selected = document.billingform.b_state.options["<? echo $session->get('s_state'); ?>"];

Note that the PHP part is using a Session class and is writing in the state value "GA" without error.

aaron_karp

It looks like you're trying to set the "selected" property of your option to a string. I'm pretty sure that either that property doesn't exist, or is a Bool.

What you can do is set the selectedIndex for the b_state menu element.

Run a little javascript loop through your Select menu and test each value to see if it equals the one held in your session variable.

I'm going to use my own generic variables in the example below...

for(var i=0; i<document.form.menu.length; i++) {
if (document.form.menu.options.value == $_SESSION['state']) {
document.form.menu.selectedIndex = i;
// probably break out of the loop, since you're done
}
}

I'm not sure of any way to do it w/o a loop, unless you know the Index of the state ahead of time, which you kind of do because it's a static (not dynamically generated) menu.

Hope this helps. Maybe someone else who knows javascript a little better can give you a more efficient answer.

earthlingzed

That indeed works. Thanks so much for your help. I spent way too much time on that last night!