jquery 3 ways to determine if a checkbox is selected

Method One: if ($ ("#checkbox-id"). Get (0). checked) {    //Do Something} method two: if ($ (' #checkbox-id '). Is (': Checked ')) {    //Do Something} Method Three: if ($ (' #checkbox-id '). attr (' checked ')} {    //do something} after the jQuery1.6 version, the check box is selected, with Propif ($ (' # Checkbox-id '). Prop (' checked ')) {//do something}  function Checkinfo () {  $ ("Input[name= ' org3.othervalues ']") . each (   function () {   if ($ (). Get (0). checked) {   return true;    }   });  var org3_ids=$ ("#org3_ids"). Val ();  if (org3_ids!= ") {   return true;  }    Alertmsg.warn ("Please select Recipient!") ");  return false; }

　　

jquery 3 ways to determine if a checkbox is selected