How to Prevent hyperlink jump

<A href = "" OnClick = ""> I encountered some problems, and I was confused for more than a month. Now I have come to the following conclusion from my netizens, which makes my problem easy to understand.

1. Linked onThe click event is executed first, followed by the action under the href attribute (page Jump, or javasCript pseudo link );
2. Assume that both href and on exist in the link.Click. If you want to disable the action under the href attributeClick must get a return value of false;
3. If the page has a scroll bar and you wantClick the event to perform the operation. Set its href attribute to javasSKIP: VO (0); instead of #. This prevents unnecessary page beats;
4. If a function with a returned value is called in the href attribute of the link, the content on the current page will be replaced by the returned value of this function;
5. The shift key is different.
6. The problem I encountered today is that the parentnode cannot be accessed in the form of href in ie6.0.
7. Try not to use javasProtocol: As the href attribute of A, this will not only trigger unnecessary window. OnBeforeunload event, in IE it will make GIF animation picture stop playing.