body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, form, fieldset, input, textarea, p, blockquote, th, td {
	margin:0;
	padding:0;
}
table {
	border-collapse:collapse;
	border-spacing:0;
}
fieldset, img {
	border:0;
}
address, caption, cite, code, dfn, em, strong, th, var {
	font-style:normal;
	font-weight:normal;
}
ol, ul {
	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;
}

html, body, div, span, applet, object, iframe,h1, h1, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,b, u, i, center,
dl, dt, dd, ol, ul, li,fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,time, mark, audio, video {
  margin: 0;  padding: 0;  border: 0;  font-size: 100%;  font: inherit;  vertical-align: baseline;}
  
  
  /*以下為常用css*/
  
.floatleft{ float:left}
.floatright{ float:right}
.clear{clear:both; height:0; font-size:1px; line-height:0;}