I encountered IE8 compatible notes_HTML/Xhtml_web page production

1. IE8's getElementById only supports id, not name
For example:
Used in IE8: var obj = document.getElementById("txt1");
At this time obj will be equal to null

2. The tag in IE8 will submit the Form by default, because the type of the tag in IE8 defaults to submit's
, so either set type=button or set onclick. ,return false;