jQuery Forum

1. $(".myCheckBoxes:checked").length // is the number of checkboxes that are checked.

Otherwise

1. $("#freeform_ch_cla_course_preferences_courses_001_1, #freeform_ch_cla_course_preferences_courses_001_2, #freeform_ch_cla_course_preferences_courses_001_3, #freeform_ch_cla_course_preferences_courses_001_4, #freeform_ch_cla_course_preferences_courses_001_5").filter(":checked").length

Next step for me is to figure out how and where to add the addClass.

I can do this. I'll get there!

I'm all set using the code below.

2. 
   
3. var $checksStudentActivities = $('.student-activities-courses').change(function () {
4. var flag1 = $checksStudentActivities.filter(':checked').length == 0;
5. if(!flag1){
6. $("#student-activities").show();
7. $('#101').addClass("required");
8. }
9. if(flag1){
10. $("#student-activities").hide();
11. $('#101').removeClass("required");
12. $('#101').val("");
13. }

Just before you posted, I got the code below to work as well.  But yours is less code so I'll go with that.

Thanks again!

2. 
   
3. var countChecked = function() {
4.  var n = $( "input:checked[name='ch_cla_course_preferences_courses_001[]" ).length;
5.  //$( "div#s" ).text( n + (n === 1 ? " is" : " are") + " checked!" );
6. if(n >= 1){
7. $( "div#sa" ).show();
8. $('#101').addClass("required");
9. }
10. if(n < 1){
11. $( "div#sa" ).hide();
12. $('#101').removeClass("required");
13. $('#101').val("");
14. }        
15. };
16. countChecked();
17.  
18. $( "input[name='ch_cla_course_preferences_courses_001[]" ).on( "change", countChecked );

Any help is appreciated.

Thanks again

That you only tested on iPhone and iPad does not make it so that it "does not work on iPhone and iPad". Well, technically so, but... it doesn't work in any browser!

http://jsfiddle.net/98211ts6/9/

You are making things difficult for yourself with unnecessary IDs, and long, complicated IDs and names.

Square brackets in names are sometimes a necessary evil when working with some server software that likes them. Javascript doesn't like them in strings! If you use the in a string, you have to "escape" the square brackets with \. And that makes already-unreadable code even more unreadable.

Are you an optometrist seeking new business? ;)

As well, you missed a single-quote and a right-bracket.

kbWood showed you a readable solution that you only partially used.

You can remove that question mark!  I definitely need an optometrist!

Truthfully, I still need to improve my grasp of syntax because escaping the [] didn'tcross my mind.  So I've got to step up my skills there.

kbwood's solution was great.  Here's the catch.  I'm using ExpressioneEngine CMS and Solspace's Freeform Pro for forms. I do hand code the form but I'll admit it, my skills still need lots of improvement so I use Freeform Pro to do the heavy lifting.  The way Freeform Pro generates the update form, is the checkbox array is listed as a bulleted list like below.  The class is placed inthe ul tag instead of in the input.  So I was unable to figure how to get it placed in there.  This is why I went with the list of id's instead of the way it should be done, using the name.  I know I need to improve my code so in the future I can use a lot less to get these things done.

Thanks again!

2. <ul id="737" class="clearfix" style="list-style:none; padding:0;">
3. <li><input type="checkbox" name="ch_cla_course_preferences_courses_001[]" value="Course 1" checked="checked" id="freeform_ch_cla_course_preferences_courses_001_1">&nbsp;&nbsp;<label for="freeform_ch_cla_course_preferences_courses_001_1">Course 1</label></li>
4. <li><input type="checkbox" name="ch_cla_course_preferences_courses_001[]" value="Course 2" id="freeform_ch_cla_course_preferences_courses_001_2">&nbsp;&nbsp;<label for="freeform_ch_cla_course_preferences_courses_001_2">Course 2</label></li>
5. </ul>