Writing JAVASCRIPT in IE and FF

The following lists the differences between the JAVASCRIPT writing methods of IE and FF in development, which are constantly updated and accumulated ,!
1. judge the browser: If it is IE, then window. navigator. userAgent. indexOf ("MSIE")> = 1 The result is TRUE; if it is FF, then window. navigator. userAgent. indexOf ("Firefox")> = 1 indicates that the result is TRUE.
2. determine the next node:
If the HTML format is: <H1 ID = "H1"> </H1>
<Ul id = "UL"> <UL>
Method of writing IE: var h1 = document. getElementById ("H1 ");
Var ul = h1.nextSibling;
Writing FF: var h1 = document. getElementById ("H1 ");
Var ul = h1.nextSibling. nextSibling; Because FF considers the line feed behind </H1> as an empty node.