长注释本来就是语法错误……

http://www.w3.org/TR/html401/intro/sgmltut.html#h-3.2.4

3.2.4 Comments

HTML comments have the following syntax:

<!-- this is a comment -->
<!-- and so is this one,
    which occupies more than one line -->

White space is not permitted between the markup declaration open delimiter("<!") and the comment open delimiter ("--"), but is permitted between the comment close delimiter ("--") and the markup declaration close delimiter (">").
A common error is to include a string of hyphens ("---") within a comment.
Authors should avoid putting two or more adjacent hyphens inside comments.

【 在 litt7e (aSimple life) 的大作中提到: 】
: 不支持 <!-------aa---> 长注释...
--
修改:withinsea FROM 221.221.152.243
FROM 221.221.152.243