JavaScript compatible with Add (cancel) Event monitoring method for Internet Explorer

As a necessary feature of JavaScript itself, the event is ubiquitous in the current use of JavaScript, and JavaScript events are used when writing to JAVASCRPT. The following is a JavaScript in the addition of event monitoring and cancellation of event monitoring methods, of course, to be compatible with the Internet and ie. The following are the compatible codes:

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2. Adding an event listener compatibility function
4. function AddHandler (target, EventType, handler) {
6. if (target.addeventlistener) {//mainstream browser
8. AddHandler = function (target, EventType, handler) {
10. Target.addeventlistener (EventType, Handler, false);
12. };
14. }else{//ie
16. AddHandler = function (target, EventType, handler) {
18. Target.attachevent ("On" +eventtype, Handler);
20. };
22. }
24. //execute a new function
26. AddHandler (target, EventType, handler);
28. }
30. Delete Event listener compatibility function
32. function RemoveHandler (target, EventType, handler) {
34. if (target.removeeventlistener) {//mainstream browser
36. RemoveHandler = function (target, EventType, handler) {
38. Target.removeeventlistener (EventType, Handler, false);
40. }
42. }else{//ie
44. RemoveHandler = function (target, EventType, handler) {
46. Target.detachevent ("On" +eventtype, Handler);
48. }
50. }
52. //execute a new function
54. RemoveHandler (target, EventType, handler);
56. }

The above code is to listen to the event function is optimized, delay loading event listener function, so that you do not have to judge the addition or deletion of events every time, only the first time to add or delete the listener event when the judgment, will greatly improve the performance of the monitoring event.

JavaScript compatible with Add (cancel) Event monitoring method for Internet Explorer