how to loop throw all the Fileds in the view to check wheather checkbox is checked or not using jquery

I have this code I am checking wheather checkbox i checked or not..

  $('#btnsubmit').click(function() {
        $('#Details input[type=checkbox]').each(function() {
            if ($(this).attr('checked')) {
                  alert("selected");
                  return false;
            } else {
                alert("please select atleast one user");
                return false;
            }
        });
    });

here var checked showing true or false..

I have deatils Fieldset in the view.. like that each field set having one check box.. like that there are three fieldsets with one check box..I need to know how many details checkbox is checked? can I loop eac开发者_开发知识库h Details Fieldset to know how many details checkboxes are cheked?

thanks

I'm not exactly sure what you're looking for here. Here's how to do it for one fieldset:

alert($('#Details input[type=checkbox]:checked').length); 

I made a little example you can try too: http://jsfiddle.net/nzLpr/

You can use the :checked selector and get the .length, like this:

$('#btnsubmit').click(function() {
  var len = $('#Details input[type=checkbox]:checked').length;
  if(len === 0) { //no checked ones were found, error
    alert("Please select at least one user.");
    return false;
  }
  // else { //Possibly present a success message
  //  alert(len + " checkboxes were selected, have a nice day!");
  //}
});

If you don't need to do anything if some are checked (seems like the most likely case), you can narrow it down to this:

$('#btnsubmit').click(function() {
  if($('#Details input[type=checkbox]:checked').length === 0) {
    alert("Please select at least one user.");
    return false;
  }
});