常用且简单的css初始化

body,h1,h2,h3,h4,p,dl,dd,ul,ol,form,input,textarea,th,td,select{margin: 0;padding: 0;}
em{font-style: normal;}
li{list-style: none;}
a{text-decoration: none;}
img{border: none;vertical-align: top;}
table{border-collapse: collapse;}
input,textarea{outline: none;}
textarea{resize:none;overflow: auto;}
body{font-size:12px;font-family: arial;}