function click_lmenu(mid){
  var melem=document.getElementById(mid+"_entry");
  if(melem.style.display==""){
	  melem.style.display="none";
  }
  if(melem.style.display=="block") {
    melem.style.display="none";
  } else {
    melem.style.display="block";
  }
}
function btn_on(elem){
	var bs=document.getElementById(elem).src;
	bs=bs.replace(/_off/g, "_on");
}
function btn_out(elem){
	var bs=document.getElementById(elem).src;
	bs=bs.replace(/_on/g, "_off");
}