A simple example of the Select All button

Select All button processing $ (function () {click Select all $ (& quot; checkAll & quot;) click (function () {varflag $ (& quot; checkAll & quot;) is (& quot;: checked & quot;); determines the status of the all-selected button varcheckItemsdocumentgetEl

// Select all button processing $ (function () {// click Select all $ ("# checkAll "). click (function () {// var flag =$ ("# checkAll") When you click the Select All box "). is (": checked"); // determines the status of the all-selected button var checkItems = document. getElementsByName ("checkItem"); for (var I = 0; I