// _bro: 1=NN6+, 2=NN4, 3=IE, 4=Opera, 0=others
_bro=(window.opera?4:(document.all?3:(document.getElementById?1:(document.layers?2:0))));
// _ie5: true=IE5+
_ie5=(navigator.appName.indexOf('Microsoft Internet Explorer')>=0 && document.getElementById)?true:false;
// _mac : true = macintosh, false = other os
_mac=navigator.userAgent.indexOf('Mac')>=0;
//=======================================================================

function getDivFromName(nm){
  if(_bro==1||_bro==4) return document.getElementById(nm);
  if(_bro==2){
    var s='';
    for(var i=1; i<arguments.length; i++)
      s+='document.layers.'+arguments[i]+'.';
    return eval(s+'document.layers.'+nm);
  }
  if(_bro==3) return _ie5?document.getElementById(nm):document.all(nm);
  return null;
}
function moveDivTo(div,left,top){
  if(_bro==1||_bro==4){ 
    div.style.left=left+'px';
    div.style.top =top +'px';
    return;
  }
  if(_bro==2){ div.moveTo(left,top); return; }
  if(_bro==3){
    div.style.pixelLeft=left;
    div.style.pixelTop =top;
    return;
  }
}
function setDivVisibility(div,visible){
  if(_bro==1||_bro==3){ 
    div.style.visibility=(visible)?'inherit':'hidden';
    return;
  }
  if(_bro==2){ div.visibility=(visible)?'inherit':'hide'; return; }
  if(_bro==4){ 
    div.style.visibility=(visible)?'visible':'hidden';
    return;
  }
}