.menu_box_style1_1{clear:both;border:0 solid #cccccc;}
.menu_box_style1_1_1{float:left;}
.menu_box_style1_1_2{float:right;padding:5px 0 0 0;}
.menu_box_style1_2{clear:both;text-align:left;height:36px;background:url(images/menu_bg_1.jpg) repeat 0 0;border:0 solid #dddddd;border-width:0 0 0 0;}
这4行padding和margin我都设置为0还是有，怎么回事啊
