[Javascript] Form field arrays in IE 5+
Peter Brunone
peter at brunone.com
Thu Apr 24 12:02:57 CDT 2003
Sorry; I forgot a crucial line (see below). That's what I get for cutting and pasting pieces...
---------- Original Message ----------------------------------
From: "Peter Brunone" <peter at brunone.com>
>I could've sworn I've done this before.
>
> I'm looping through a form's elements, and when I get to a radio button or checkbox, I want to determine whether any options are checked. Now, as far as I can remember, if you have a radio/checkbox collection with all elements named the same, then you can treat it as an array... BUT, for some reason, IE is still acting as if each of them is a separate entity, which really gives me no way to tie them together. Below is a sample piece of script I'm using to get the pieces, but the browser refuses to believe that four <input type="radio"> with the same name are really pieces of one collection.
>
> for(var i=0;i<document.mainForm.elements.length;i++) {
currentField = document.mainForm.elements[i];
> if(currentField.type == "text") {
> if(currentField.value == "") { isValid = 0 }
> }
> else if(currentField.type == "radio") {
> isChecked = 0;
> j = 0;
> for(var j=0;j<currentField.length;j++) {
> if(currentField[j].checked == true) {isChecked = 1}
> alert(currentField.value + " " + currentField.checked); // Debugging
> }
> if(isChecked == 0) { isValid = 0 }
> }
> }
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