javascript - jQuery 1.9 checkbox count -

i have old jquery code 1.6 works i'm redoing website , upgraded 1.9.1 jquery , old code not work.

$("input[type=checkbox][name=compare[]]").click(function() {         var bol = $("input[type=checkbox][name=compare[]]:checked").length >= 5;          $("input[type=checkbox][name=compare[]]").not(":checked").attr("disabled",bol);      $(this).closest("tr").toggleclass("marked", this.checked); }); 

i have table rows single checkbox value of row, if checked pushes row id array can work else it. allows 5 checkboxs active @ once , disables rest can't checked (yes know these can done via dom it's checked in php before processing). apply class marked darker bg make easier read.

i receive following error in javascript console in chrome on load

uncaught error: syntax error, unrecognized expression: input[type=checkbox][name=compare[]]  

at time code more of hack job , surprised self worked (lol).

the following code select checked checkboxs , put value array json' off via ajax.

$("input[type=checkbox][name=compare[]]:checked").each(function() {         data['id[]'].push($(this).val());     }); 

i've started rewrite hit problem when trying give each checkbox it's own unique identifier, while before jquery self.

.compare_check class of checkbox

$('.compare_check').click(function() {           if (!$(this).is(':checked')) {                  // work on 

any appreciated.

wrap value attribute want check in double quotes, you'd have:

$('input[type=checkbox][name="compare[]"]') 

rather than

$("input[type=checkbox][name=compare[]]") 

alternatively can use \\ escape [ , ] in attribute name:

$("input[type=checkbox][name=compare\\[\\]]") 

you should using .prop(), rather .attr(), set elements disabled.