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Message-ID: <2191909.4EKZz3fc86@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Mon, 03 Dec 2012 23:15:40 +0100
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Subject: Re: IE9 is not a friend...
Newsgroups: comp.lang.javascript
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Xref: csiph.com comp.lang.javascript:17438

Andrew Poulos wrote:

> On 4/12/2012 8:04 AM, justaguy wrote:
>> Here's a simple js function.
>>
>> // detect if any of 4 fields is empty before data entry in field 5
>> function haveFour() {
>> var fourFields = ['rep','contact','Market_Segment','pricing'];
>> for (i=0; i<4; i++) {
>> if (document.getElementById(fourFields[i]).value=='') {
>> alert('Please fill in '+fourFields[i] + ' field');
>> return;
>> }
>> }
>> }
>>
>> However, it works as designed for Chrome 23, Firefox 16
>> but it fails with IE9.  All on Windows 7.
>> Any idea as to the reason of failing IE9?
> 
> What about testing for
>    if (!document.getElementById(fourFields[i]).value.length) {
> instead?

That would be unnecessarily cryptic, error-prone and comparably inefficient 
on top of the already inefficient approach.

> Also I'd put 'i' in with 'var' ie
>    var i, fourFields...
> and add
>    var len = fourFields.length;
>    for (i = 0; i < len; i++) {

Or 

   var fourFields = …;
   for (var i = 0, len = fourFields.length; i < len; i++)
   {
 
> We need to see the HTML to know what might be going awry.

More important, we need to know their definition of an "empty field" and 
"fails".


PointedEars
-- 
Anyone who slaps a 'this page is best viewed with Browser X' label on
a Web page appears to be yearning for the bad old days, before the Web,
when you had very little chance of reading a document written on another
computer, another word processor, or another network. -- Tim Berners-Lee