JavaScript timers - using functions and scope

JavaScript timers - using functions and scope - Robert’s talk - Web development and Internet trends
setElmBGColor function - using a function and scope

function setElmBGColor (bgColor) {
 var currentElm = this;
 setTimeout(function () {
  currentElm.style.backgroundColor = bgColor;
 }, 1000);
}

setElmBGColor function - using a function with scope and closure

function setElmBGColor (bgColor) {
 setTimeout(function (elm) {
  return function () {
   elm.style.backgroundColor = bgColor;
  };
 }(this), 1000);
}