#main_r div {
	border:1px solid #6DC0E9;
	margin-bottom:10px;
}

.clear {clear:both; height:0; overflow:hidden; display:block;}

/*f_开头为float漂浮,l:左 r:右*/
.f_l {
	float:left;
}
.f_r, .date {
	float:right;
}

#treemenu .bg_se{background:#F2F9FD /*url(images/center_bg_1.gif) no-repeat 160px -76px; */!important}