Counting checkboxes

[timjwild]

I've searched through this forum and have seen plenty of discussions on how to check if a checkbox is ...erm checked.

My problem is slightly different. I have a page with 100 possible selections from which the user may only select 25. How do I count the number of selected boxes and flag an alert if the user exceeds 25?

Thanks

Tim

 

[timjwild]

...And I need it to work in NS6!

Thanks

Tim

 

[iza]

i'm giving you the generic way to do so, because i still haven't tested nn6 (yessss, shame on me) - but it should be easy to adapt - let me know if you have trouble doing so, i'll try to help
the idea is to loop thru the form.elements array - for each element, check if the type is "checkbox", if yes, check if it's checked, if yes, then increment the counter :
function how_many_checked(){
counter = 0;
for (index=0: index < formname.elements.length; index++){
if (formname.elements[index].type==&quot;checkbox&quot
if (forname.elements[index].checked)
counter++;
} // end for loop
if (counter > 25) {
alert (&quot;hey that's too many boxes checked&quot
return false
}
return true;
}

 

[angst11]

http://javascript.internet.com/

Go to the site above and search for checked boxes. They have some great examples there!

angst11