body, div, p, h1, h2, h3, h4, h5, h6, blockquote,  /* structural elements 结构元素 */
dl, dt, dd, ul, ol, li, /* list elements 列表元素 */
pre,  /* text formatting elements 文本格式元素 */
form, fieldset, legend, button, input, textarea,  /* form elements 表单元素 */
table,th,td /* table elements 表格元素 */{
	margin:0;
	padding:0;
}

body,
button, input, select, textarea /* for ie */ {
    font: 14px/24px Arial, 'Microsoft Yahei',"宋体", sans-serif;
}
/** 重置文本格式元素 **/
a { text-decoration: none; }
li {
	list-style: none;
}
/* 清浮动 */
.clearfix:after {
    visibility:hidden;
    display:block;
    font-size:0;
    content:" ";
    clear:both;
    height:0;
}
.clearfix {
    zoom:1; /* for IE6 IE7 */
}