problem validating checkbox

[Peter B. Ensch]

Can anyone explain why this code fails when the set of checkboxes
consists of only one.

myForm.update.l ength returns 0 instead of 1 with the result that
I get an alert box even tho' the one checkbox is checked.

Thanks,
P


function checkForm(myFor m) {
var numBoxes = 1*myForm.update .length || 0;
for(i=0;i<numBo xes;i++) {
if(myForm.updat e[i].checked == true)
return true;
}
alert("Select one or more part components to update");
return false;
}
}

[Peter B. Ensch]

Re: problem validating checkbox - errata

Peter B. Ensch wrote:
[color=blue]
> Can anyone explain why this code fails when the set of checkboxes
> consists of only one.
>
> myForm.update.l ength returns 0 instead of 1 with the result that
> I get an alert box even tho' the one checkbox is checked.
>
> Thanks,
> P
>
>[/color]

My apologies. A bad cut&paste led to an error in my code
example. It should have read:

function checkForm(myFor m) {
var numBoxes = 1*myForm.update .length || 0;
for(i=0;i<numBo xes;i++) {
if(myForm.updat e[i].checked == true)
return true;
}
alert("Select one or more part components to update");
return false;
}