[Javascript] variable undefined problem

[hypersdc at cox.net]

Ok. But how should I fix that. Any recommendations?
I'm trying to get the variable values from the external file without knowing
how many items are in the list.

Thanks
----- Original Message -----
From: "Rodney Myers" <rodney at aflyingstart.net>
To: "[JavaScript List]" <javascript at LaTech.edu>
Sent: Saturday, May 24, 2003 2:10 AM
Subject: Re: [Javascript] variable undefined problem


> Hello,
>
> As the while loop starts with a valid itemCheck variable it should cycle
> until the last valid variable.
> But inside the loop you have
>
> x = "item" + i;
> itemCheck =eval(x);
>
>
> if itemN was the last valid item, and so permitted entry to the loop
> the N+1 is guaranteed to be undefined.
>
> hth
>
> Rodney
>
>
> hypersdc at cox.net wrote:
>
> >I'm having problems with a variable undefined error.
> >
> >I'm grabbing a set of variables from a file (.js file). I'm cycling
through
> >the variables with a while statement. The problem I'm having is the last
> >variable is getting an undefined. How can I fix the code so this doesn't
> >happen.
> >
> >//Start Code:
> >
> >var i = 0;
> >var itemCheck = item0;
> >while(window.itemCheck)
> >{
> >
> >  document.write("<A HREF=" + itemCheck + ">" + itemCheck + "<BR></A>" );
> >
> >   i++;
> >x = "item" + i;
> >itemCheck =eval(x);
> >
> >if (typeof eval(x) == 'undefined')
> >    alert('2 Undefined');
> >else
> >    alert('2 okay');
> >itemCheck =eval(x);
> >
> >
> >}
> >
> >
> >//End code
> >
> >//js content
> >var item0 = "name 1";
> >var item1 = "name 2";
> >
> >//end js file content
> >
> >Thanks in advance
> >
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> >
> >
> >
>
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>
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