Use JavaScript to modify the method executed by the onclick event in the component

In the past, I often encountered a situation in projects where clicking on the same html component would execute different methods or functions. So I wrote the following method myself, which is relatively stupid, but still executable.

The core code is as follows:

1.                                                                                                                                                                                                                                                      .         * Created by: FrancisRan

6.        * Created time: 2010-07-30

7.             * Last modified time: 2010-07-30

8.                                    .com

9.            */

10.                                                             tTest" ; alert("Modify The last onclick: nn" + document.getElementById("eventTest").onclick); ​​​// Modified event

28.        function alertEvent2 () {

29.               alert("This is an event triggered after deletion"); script>

33.

34.

35.