pointer.js

function initmark(status){
  initmarkstatus = status;
  console.log('initmark(status)',status);
  if (!status){
    document.body.onmouseover = function(){};
    document.body.onmouseout = function(){};
    return
  }
  var saveFirstStyle = {backgroundColor: null, opacity: null};
  function mouseover(e){
    if (e.target.parentElement.id == 'operator-pointer') return;
    saveFirstStyle.backgroundColor = e.target.style.backgroundColor;
    saveFirstStyle.opacity = e.target.style.opacity;
    e.target.style.backgroundColor = "#f00";
    e.target.style.opacity = "0.5";
  }
  function mouseout(e){
    if (e.target.parentElement.id == 'operator-pointer') return;
    e.target.style.backgroundColor = saveFirstStyle.backgroundColor;
    e.target.style.opacity = saveFirstStyle.opacity;
  }
  document.body.onmouseover = mouseover;
  document.body.onmouseout = mouseout;
}