function getX(id){
  var x = 0;
  var obj = document.getElementById(id);
  if(obj){
    x = obj.offsetTop;
    var o = obj;
    while(o=o.offsetParent){
      x += o.offsetTop;
    }
  }
  return x;
}
function getY(id){
  var y = 0;
  var obj = document.getElementById(id);
  if(obj){
    y = obj.offsetLeft;
    var o = obj;
    while(o=o.offsetParent){
      y += o.offsetLeft;
    }
  }
  return y;
}

function moveObjToXY(id, x, y){
  var obj=document.getElementById(id);
  if(obj){
    //x += 3;
    //y += 10;
    obj.style.top = x + "px";
    obj.style.left = y + "px";
    obj.style.zIndex = 0;
    obj.style.display = "none";
  }
}

function setClass(id, classname){
  var obj = document.getElementById(id);
  if(obj){
     obj.className=classname;
  }
}
function showMenu(id){
  var obj = document.getElementById(id);
  if(obj){
    obj.style.zIndex = 9999;
    obj.style.display = "";
  }
}
function hideMenu(id){
  var obj = document.getElementById(id);
  if(obj){
    obj.style.display = "none";
    obj.style.zIndex =0;
  }
}