标签：<div><span css属性：width,height,padding:上下 左右; margin:上 右 下 左;position:absolute/relative/fixed/static;
<p> css属性：font-family,font-size,font-weight,font-style,color,text-decoration,text-align:justify;letter-spacing,word-spacing,
<a href=" " target="_blank"> css属性：color,text-decoration,
<img src=" " alt=" " > css属性：padding,margin,vertical-align:text-bottom/text-top/middle;
<ul><li> <ol><li> css属性：float,display:block;background-position,list-style-type,list-style-image:url();
<table><caption><thead><tbody><tfoot><col><tr><th><td> css属性：border-collapse:collapse; table-layout:fixed; vertical-align:middle;
<iframe src=" ">
<input type=" " name=" " value=" " align=" "> css属性：back-ground-color:transparent;
type:text,radio,checkbox,password,submit,reset,image,textarea,number,range,color,
<select name=" "><option value=" ">
伪元素：p:first-letter{} div:first-child{} a:link{} a:visited{} a:hover{} a:focus{} a:active{}
属性选择器：img[width]{}
兄弟选择器：h1+p{} (选择所有紧跟在一个<h1>后的<p>元素)
派生选择器：div#greentea>blockquote p:first-line{}
图片替换：<span>Head Line</span>
span{display:none;}
body{background-image:url();
background-repeat:no-repeat;}
滑动门：<li><a href="#"><strong>Home</strong></a></li>
#menu ul li a{display:block;
line-height:35px;
color:#ddd;
text-decoration:none;
padding:0 0 0 14px;}
#menu ul li a:hover{color:#fff;
background:url() no-repeat right top;}
#menu ul li a strong{display:block;
padding:0 14px 0 0;}
(IE中存在bug需增加#menu ul li a{float:left;})