isArray function

[rico14d]

Hi,

I need a function to check for an array of form elements.
At the moment I am using this -

if (document.form1.text_box.length == undefined)
//not array

But i need a way to do this in IE 5.01 and it doesnt seem to work.

Anyone have a different way of checking for this?

Thanks,
Rich

 

[Deleted]

Here you go..

<script language=javascript>
<!--//
function fieldValidate() {
	var d = document.theForm;

	var isFull = fieldCheck(
	d.field1.value, "FIELD #1",
	d.field2.value, "FIELD #2",
	d.field3.selectedIndex, "FIELD #3");

	if (!isFull) {
		return false;
	}
}

function fieldCheck() {
	for (var i = 0; i < arguments.length; i += 2) {
		if (!arguments[i]) {
			alert ("Please enter " + arguments[i + 1] + ".");
			return false;
		}
	}
	return true;
}
//-->
</script>

<form method="POST" onSubmit="fieldCheck()">
FIELD 1: <input type="text" name="field1"><br>
FIELD 2: <input type="text" name="field2"><br>

FIELD 3:
<select name="FIELD3">
<option value=""></option>
<option value="Test"></option>
</form>

http://unixjunky.com

 

[Deleted]

Oops.. forgot something

<select name="[b]field3[/b]">
<option value=""></option>
<option value="Test"></option>
[b]</select>[/b]

http://unixjunky.com

 

[adam0101]

Get an array of same-name elements using document.getElementsByName(). It should return null if none found.

Adam

 

[rico14d]

Hi,

Thanks for your help, i actually got it working by changing the code slightly -

if (document.form1.text_box.length == undefined)

if (typeof(document.form1.text_box.length) == 'undefined')

I think the quotes around the "undefined" made the difference.

Cheers,
Rich.

 

[adam0101]

If you wanted to check for the existence of just one box, you could use this too:

if(document.form1.text_box)

Adam