jquery traversal checkbox method to get the value of the selected item

  This article mainly introduces the jquery traversal checkbox to get the value of the selected item, the need for friends can refer to the following

Source code:    codes are as follows: JQuery (function ($) {  $ ("Input[name= ' key ']:checkbox"). Click (function () {  var ids = ';   var flag = 0;  $ ("#ids"). attr ("value", IDS);  $ ("Input[name= ' key ']:checkbox"). each (function () {  if (true = = $ (this). attr ("checked")) {  ids + = $ (this). attr (' value ') + ', ';  flag = 1; } } ');  if (0 < flag) {  $ ("#ids"). attr ("value", IDs);  return true; }else {  alert (' Please select at least one! ');  return false; } }); });    source function:    Get the value of the checkbox for Name= ' key ' to write the values of the selected item to the hidden Domain <input type= "hidden" name= "IDs" id= "IDs" value= "/>" forms.     CORE Statement:    code is as follows: $ ("input[name= ' key ']:checkbox"). each (function () {  if (true = = $ (this). attr ( "Checked") {  IDs + $ (this). attr (' value ') + ', '; } } ';    in HTML, if a check box is selected, the corresponding tag is checked= " Checked ". But if you use jquery alert ($ ("#id"). attr ("Checked"), you will be prompted to be "true" instead of "checked", so determine if ("Checked" ==$ ("#id"). attr ("ChEcked ")) is wrong and should be written as above: if (true = = $ (" #id "). attr (" checked "))