相信很多weber前端设计师在code for html的时候，最头痛的应该就是兼容问题，例如一些最基础的padding、marging甚至是width在IE和FF（火狐）下都会不一样，这真的让人很不爽啦，于是一群guys就写了一些兼容性的代码，以在我们code for html的时候先消除掉这些差异哦。
[css]
/*
Copyright (c) 2010, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.com/yui/license.html
version: 3.3.0
build: 3167
*/
/*
TODO will need to remove settings on HTML since we can't namespace it.
TODO with the prefix, should I group by selector or property for weight savings?
*/
html{
color:#000;
background:#FFF;
}
/*
TODO remove settings on BODY since we can't namespace it.
*/
/*
TODO test putting a class on HEAD.
- Fails on FF.
*/
body,
div,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
code,
form,
fieldset,
legend,
input,
textarea,
p,
blockquote,
th,
td {
margin:0;
padding:0;
}
table {
border-collapse:collapse;
border-spacing:0;
}
fieldset,
img {
border:0;
}
/*
TODO think about hanlding inheritence differently, maybe letting IE6 fail a bit...
*/
address,
caption,
cite,
code,
dfn,
em,
strong,
th,
var {
font-style:normal;
font-weight:normal;
}
/*
TODO Figure out where this list-style rule is best set. Hedger has a request to investigate.
*/
li {
list-style:none;
}

caption,
th {
text-align:left;
}
h1,
h2,
h3,
h4,
h5,
h6 {
font-size:100%;
font-weight:normal;
}
q:before,
q:after {
content:'';
}
abbr,
acronym {
border:0;
font-variant:normal;
}
/* to preserve line-height and selector appearance */
sup {
vertical-align:text-top;
}
sub {
vertical-align:text-bottom;
}
input,
textarea,
select {
font-family:inherit;
font-size:inherit;
font-weight:inherit;
}
/*to enable resizing for IE*/
input,
textarea,
select {
*font-size:100%;
}
/*because legend doesn't inherit in IE */
legend {
color:#000;
}
.clearfix:after{ content:"."; clear:both; height:0; display:block; visibility:hidden;}
.clearfix {zoom: 1;}
[/css]