/*二级菜单*/
var sb = 0;
var sba = 0;
var $ = function(i){ return document.getElementById(i); }
function mychg(m){
    if(sba==1) {
	sbb=$("lm"+m).style.display;
	$("lm"+m).style.display=sbb=="none"?"block":"none";
	$("father"+m).className=$("father"+m).className==""?"on":"";
	}
	else {
    if(sb!=0){ 
	$("lm"+sb).style.display="none";
	$("father"+sb).className="";
	}
    if(sb!=m){
        $("lm"+m).style.display="block";
		$("father"+m).className="on";
        sb=m;
    }
    else sb=0;
	}
}