Prevents event bubbling and browser default behavior

There are two troubles in browsers. The following provides two function solutions for reference and a demo to help you understand the two troubles I mentioned more intuitively.

2. <Script language = "JavaScript">
6. /* ---------------------------
8. function: Stop event bubbling
10. --------------------------- */
12. function stopbubble (e) {
14. // If an event object is provided, this is a non-IE browser
16. If (E & E. stoppropagation)
18. // Therefore, it supports the W3C stoppropagation () method
20. E. stoppropagation ();
22. else
24. // otherwise, we need to use IE to cancel event bubbling.
26. window. event. cancelbubble = true;
28. }
30. // block the default browser behavior
32. function stopdefault (e) {
34. // block the default browser action (W3C)
36. If (E & E. preventdefault)
38. E. preventdefault ();
40. // method of blocking the default action of the function in IE
42. else
44. window. event. returnvalue = false;
46. return false;
48. }
52. </SCRIPT>