#tabtop{background:url(http://www.iac.ac.jp/tokyo/common/image/tab_top.gif); background-position: 0 0; background-repeat:no-repeat; width:503px; height:44px; display:block;}
#tabbody{background:url(http://www.iac.ac.jp/tokyo/common/image/tab_middle.gif); background-position: 0 0; background-repeat:repeat-y; padding:10px 0 5px 10px; width:493px; min-height:180px; _height:160px;}
#tabfoot{background:url(http://www.iac.ac.jp/tokyo/common/image/tab_bottom.gif); background-position: 0 0; background-repeat:no-repeat; width:503px; height:12px; padding-bottom:15px;}

#tabtop a{width:120px; height:33px; background-position:0 0; background-repeat:no-repeat; display:block; position:relative; float:left; cursor:pointer;}
#tab1{ left:0px;}
#tab2{ left:0px;}
#tab3{ left:0px;}
#tab4{ left:0px;}