function ContentA_Tab (val) {

	var objrow = "gnb_sub_tab";
	var objtab1 = "gnb_num";
		for(i=1;i<5;i++) {
			objwrap = document.getElementById(objrow+i);
			realtab = document.getElementById(objtab1+i);
			objimg2 = realtab.getElementsByTagName("IMG");
		if(val==i) {
		    if(objwrap)
			    objwrap.style.display="block";
			objimg2[0].src ="/chinese/img/common/tabmenu_top_"+i+"_on.gif";
		} else {
		    if(objwrap)
			    objwrap.style.display="none";
			objimg2[0].src ="/chinese/img/common/tabmenu_top_"+i+"_off.gif";
		}
	}
	return;
}