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Having some trouble just making a loop

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Apr 07.2008

I have a hidden element in HTML that contains a number of times I want a loop to run, based on the number of elements fetched from an SQL query.

I am doing the following code in JavaScript to make the loop run according the the value that is store in this hidden element (optCount).

The loop does not loop at all.

[CODE]var optCount = (document.getElementById(‘optionCount’).value);

// Add the options to the drop down menu
for(i=1; i < (optCount+1); i++)
{
}[/CODE]

What am I doing wrong?

EDIT: It seems to not loop at all, unless the number of loops is above 5, even with a manually entered number.

Thanks,
TK

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5 Comments(s) ↴

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@AnotherMuggleauthorApr 07.2008 — Just realised it works OK in IE but not in Firefox.

Is there a known bug?
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@Logic_AliApr 08.2008 — 
var optCount = (document.getElementById('optionCount').value); [/quote][I]optCount[/I] is a string. Try:
var optCount = Number(document.getElementById('optionCount').value);

if( !isNaN(optCount )
for(var i=1; i &lt; (optCount+1); i++)
{
...
}
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@AnotherMuggleauthorApr 08.2008 — I actually have it working in Firefox now.

Was some code elsewhere that was interferring.

However, still got similar problems with Safari.

The Java Console is reporting that:
[CODE]document.getElementById('optionCount').value[/CODE]

is returning a NULL value.

Any ideas?
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@Logic_AliApr 08.2008 — 
The Java Console is reporting that:
document.getElementById('optionCount').value
is returning a NULL value.[/quote]You could be referencing it before it's rendered, but less unlikely if it works on other browsers. Try unhiding it and see what it displays. Otherwise need to see code.
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@AnotherMuggleauthorApr 08.2008 — You could be referencing it before it's rendered, but less unlikely if it works on other browsers. Try unhiding it and see what it displays. Otherwise need to see code.[/QUOTE]

Thanks.

Fairly new to JavaScript.

How do I go about unhiding?

Thanks,

TK
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