/* css reset */
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,form,fieldset,legend,input,textarea,p,th,td{margin:0;padding:0}table{border-collapse:collapse;border-spacing:0}fieldset,img{border:0}caption,em,strong,th{font-style:normal;font-weight:normal}li{list-style:none}caption,th{text-align:left}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal}
body,input,button,select,textarea {font: 12px/1.4em tahoma,arial,sans-serif}/* 1.6em是黄金分割，最合适阅读的行距 */
/* css */
.fl{float:left}.fr{float:right}.cl{clear:both}.tl{text-align:left}.tc{text-align:center}.tr{text-align:right}.none{display:none}
a{ text-decoration:none}
a:hover{ text-decoration:underline}