pass 2d array to a function from html

[justride]

Hello,

I have mutliple HTML

<select name="requirements[0][]" multiple size=10>

select boxes on my page that get used by PHP. [0][0] - [n]n]

my question is, how can I send this array to a javacript function to verify a value exists at [0][0] in such a way as i do with a text field.

onsubmit="return IsFormValid('form','unitnumber','unitname',requirements[][]);"
....
function IsFormValid(form,unitnumber,unitnam,requirements){
	var req = document.forms[FormName].elements[requirements[0][0]];
	alert("req:".req.value)

does not work and causes an error in ie.

any help would be awesome

thanks

 

[BillyRayPreachersSon]

It's the "[" and "]" in the name that causes the problem... If you give it an ID as well, and refer to it using getElementById, that would do the trick.

Hope this helps,
Dan



Coedit Limited - Delivering standards compliant, accessible web solutions

[tt]Dan's Page [blue]@[/blue] Code Couch

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[/tt]

 

[justride]

<select name="requirements[0][]" id="reqs" multiple size=10>

var reqs = new Array();
reqs = document.getElementById("reqs");
alert("req:".reqs)

this gives an alert with undefined.

alert("req:".reqs[0][0].value) <--- that fails


any suggestions?

 

[trollacious]

This

alert("req:".reqs[0][0].value)

makes no sense at all. There is no string object property array named reqs, which is what you're asking your code to access.

And you're missing some quotation marks in your form element associative array

var req = document.forms[FormName].elements[[b][red]'[/red][/b]requirements[0][0][b][red]'[/red][/b]];

alert([b][red]'req: ' + req.value[/red][/b]);

You'll also have to actually SPECIFY the FormName or put it in quotes, since you're not passing the name to the function as an argument.

You should really try to understand the code you're working with rather than copy and paste someone else's work and then whack at it like that. It's not that much different from PHP, so it shouldn't be too difficult for you to figure out.

Lee

 

[BillyRayPreachersSon]

Woah, boy.

You ask one question, I answer it, and then you say something else totally unrelated, and really erroneously put together doesn't work.

Take it slowly, think about what you're asking, and the code you have.

Perhaps even run it in Firefox, and look at the errors in the JS console. You should be able to figure it out from there.

Dan

Coedit Limited - Delivering standards compliant, accessible web solutions

[tt]Dan's Page [blue]@[/blue] Code Couch

http://www.codecouch.com/dan/

[/tt]

 

[justride]

Sorry for my ignorance here. I went off on a tangent with the getElementByID (researchin online) attribute and lost track of my initial problem. My lack of knowledge combined with IE's wonderful debug mechanisms (j/k) doesnt make learning JS any easier, hence why I resort to alert()'s, unsuccessfully, and this board.

I appreciate the both of your patience and input. I have this worked out now.

Thanks guys.

 

[trollacious]

The Firefox browser has a built-in Javascript console that will give you the errors by line and character. I recommend it highly if you're going to do much work with Javascript.

Lee