#main_bg{float: left; position:relative; width:1300px; left: 50%; margin-left: -650px; background:#f1f1f1;}
#main{float: left; position:relative; width:1002px; left: 50%; margin-left: -500px;  background:#fff;}
#tbody{float: left; width:804px; margin-left: 4px; background:url(../images/header/tbody_bg.png) repeat-y;}
#footer{float: left; background:url(../images/footer/footer.jpg) no-repeat; width:1300px; height:144px; text-indent:-9999px;}




/*qa*/
.qa_title {background:url('../images/header/sub_navi/top_bg3.png') no-repeat;}
#tbody_qa{float: left; background:url(../images/qa/tbody.jpg) no-repeat; width:804px; height:287px; text-indent:-9999px;}

/*news*/
.news_title {background:url('../images/header/sub_navi/top_bg4.png') no-repeat;}
#tbody_news{float: left; background:url(../images/news/tbody.jpg) no-repeat; width:804px; height:287px; text-indent:-9999px;}

/*notice*/
#tbody_notice{float: left; background:url(../images/notice/tbody.jpg) no-repeat; width:804px; height:287px; text-indent:-9999px;}