function shownav(myid){
	for(i=0;i<=7;i++){
	document.getElementById('nav'+i).className="";
	}
	document.getElementById('nav'+myid).className="hover";
	}
function setTab(m,n){
var tli=document.getElementById("tab_news_menu"+m).getElementsByTagName("li");
var mli=document.getElementById("tab_news_list"+m).getElementsByTagName("dl");
for(i=0;i<tli.length;i++){
     tli[i].className=i==n?"hover":"";
     mli[i].style.display=i==n?"block":"none";
}
}