function viewBoard(a){
	if (document.all){
		board1.style.visibility="hidden";
		board2.style.visibility="hidden";

		b = eval(a + ".style");
		b.visibility="visible";
	}else if (document.layers){
		document.board1.visibility="hidden";
		document.board2.visibility="hidden";

		b = eval("document." + a);
		b.visibility="show";
	}
}
function viewBoardIMG(a){
	document.images.board_tit1.src="/image/main/r_m6_t1.gif";
	document.images.board_tit2.src="/image/main/r_m6_t2.gif";
	b = eval("document.images.board_tit" + a);
	b.src="/image/main/r_m6_t" + a + "o.gif";
}
function viewCate(a){
	if (document.all){
		cate1.style.visibility="hidden";
		cate2.style.visibility="hidden";
		cate3.style.visibility="hidden";
		cate4.style.visibility="hidden";
		cate5.style.visibility="hidden";
		cate6.style.visibility="hidden";

		b = eval(a + ".style");
		b.visibility="visible";
	}else if (document.layers){
		document.cate1.visibility="hidden";
		document.cate2.visibility="hidden";
		document.cate3.visibility="hidden";
		document.cate4.visibility="hidden";
		document.cate5.visibility="hidden";
		document.cate6.visibility="hidden";

		b = eval("document." + a);
		b.visibility="show";
	}
}
function viewCateIMG(a){
	document.images.cate_tit1.src="/image/main/m_m3_t1.gif";
	document.images.cate_tit2.src="/image/main/m_m3_t2.gif";
	document.images.cate_tit3.src="/image/main/m_m3_t3.gif";
	document.images.cate_tit4.src="/image/main/m_m3_t4.gif";
	document.images.cate_tit5.src="/image/main/m_m3_t5.gif";
	document.images.cate_tit6.src="/image/main/m_m3_t6.gif";
	b = eval("document.images.cate_tit" + a);
	b.src="/image/main/m_m3_t" + a + "o.gif";
}