asked on

javascript count checked checkboxes

hi experts.
I have a form with two sets of checkboxes in the same form (unavoidable, client request).

I need to limit the number of boxes checked, in EACH set, to two.

The IDs of checkbox set #1 are: PR2a,PR2b,PR2c,PR2d,PR2e,PR2f,PR2g,PR2h,PR2i
The IDs of checkbox set #1 are: PR3a,PR3b,PR3c,PR3d,PR3e,PR3f,PR3g,PR3h,PR3i

I need my javascript to raise an alert
if the first set has more than two boxes checked
AND/OR
if the second set has more than two boxes checked

A separate function for each would be fine.

the ID of my form is "frm1", and my form calls the function(s) with the statement onclick="return checkit(this.form)"

Any help would be much appreciated. I am pretty good at VBScript, but a relative newbie at javascript.

sh0e

function checkit(formid){
var id1 = "PR2a,PR2b,PR2c,PR2d,PR2e,PR2f,PR2g,PR2h,PR2i";
var id2 = "PR3a,PR3b,PR3c,PR3d,PR3e,PR3f,PR3g,PR3h,PR3i";
var count1=0, count2=0;
arr1 = id1.split(',');
arr2 = id2.split(',');
for(i=0;i<arr1.length;i++)
if(document.getElementById(arr1[i]).checked == 1)
count1++;
for(i=0;i<arr2.length;i++)
if(document.getElementById(arr2[i]).checked == 1)
count2++;
if(count1 > 2 || count2 > 2)
alert('more than 2 checked');
}

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ASKER CERTIFIED SOLUTION

hielo

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TOM BURKHARDT

ASKER

pretty darn cool, thanks!!

TOM BURKHARDT

ASKER

You saved me literally hours of head-banging which is time I simply cannot afford right now. Thanks so much,

hielo

you are welcome.