body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, form, fieldset, input, p, blockquote, th, td { margin:0padding:0}
body { font-size:12pxcolor:#666font-family:Verdana, Microsoft YaHei, Simsunbackground:#fffline-height:24px}
fieldset, img { border:0}
ol, ul { list-style:none}
h1, h2, h3, h4, h5, h6{ font-size:100%}
em { font-style:normal}
input, button, select, textarea { outline:none}
textarea { resize:none} //禁用了文本的拖拉，尤其在谷歌下
p{ text-align:justifytext-justify:distribute} //为了使文本段落左右两边对齐
最耗资源的，最简单的
* { padding: 0margin: 0border: 0}
选择性初始化举例（综合）
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,legend,button
form,fieldset,input,textarea,p,blockquote,th,td {
padding: 0
margin: 0
}
3. 参考新浪、雅虎
/* 新浪全局样式 */
body,ul,ol,li,p,h1,h2,h3,h4,h5,h6,form,fieldset,table,td,img,div{
margin:0padding:0border:0
}
body{
background:#fffcolor:#333font-size:12pxmargin-top:5pxfont-family:"SimSun","宋体","Arial Narrow"
}
ul,ol{
list-style-type:none
}
select,input,img,select{
vertical-align:middle
}
a{text-decoration:none}
a:link{color:#009}
a:visited{color:#800080}
a:hover,a:active,a:focus{color:#c00text-decoration:underline}
/* 雅虎全局样式 */
html {
background: none repeat scroll 0 0 #FFFFFF
color: #000000
}
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 none
}
address, caption, cite, code, dfn, em, strong, th, var {
font-style: normal
font-weight: normal
}
li {
list-style: none outside 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 none
font-variant: normal
}
sup {
vertical-align: text-top
}
sub {
vertical-align: text-bottom
}
input, textarea, select {
font-family: inherit
font-size: inherit
font-weight: inherit
}
input, textarea, select {
}
legend {
color: #000000
}
body {
font: 13px/1.231 arial,helvetica,clean,sans-serif
}
select, input, button, textarea {
font: 99% arial,helvetica,clean,sans-serif
}
table {
font-size: inherit
}
pre, code, kbd, samp, tt {
font-family: monospace
line-height: 100%
}
a {
text-decoration: none
}
a:hover, a:focus {
text-decoration: underline
}
strong {
font-weight: bold
}
input[type="submit"] {
cursor: pointer
}
button {
cursor: pointer
}
首先我们要知道，每一个html标签都有其自己的默认样式，而css则可以改变html的样式。比如一个div元素，它存在默认的margin值，而设计需要其对齐左上角，那么就要修改其margin值，对于大量的div设置就很麻烦，所以初始化css样式就很重要。
