BSP - Process bar

function doProgressBar(){

  if(!document.all.sapProgressBarWindowId){
    var height=0;var width=0;var left=0;var top=0;

    height=document.body.clientHeight;
    width=document.body.clientWidth;
    top=document.body.scrollTop;
    left=document.body.scrollLeft;

    width=825;
    height=572;
    left+=(width - 333) / 2;
    top+=(height - 575) / 2;
//    top+=(height - 248) / 2;

    var progressBar = "<div id='sapProgressBarWindowId' style='position:absolute;left:" + left + ";top:" + top + ";width:238;height:20;display:block;z-index:999999;'>" +
//    var progressBar = "<div id='sapProgressBarWindowId' style='position:absolute;left:" + left + ";top:" + top + ";width:333;height:141;display:block;z-index:999999;'>" +
                      "<img src='이미지 주소'>" +
                      "</div>";
    var bodyId = document.getElementsByTagName("body")[0];
    bodyId.insertAdjacentHTML("afterBegin", progressBar);
  }else{
    document.all.sapProgressBarWindowId.style.display = "block";
  }
}

function stopProgressBar(){
  if(document.all.sapProgressBarWindowId){
    document.all.sapProgressBarWindowId.style.display = "none";
  }
  isSubmit = false;
}

ex)
var isSubmit = false;
function doubleClickProtect(){
  if(isSubmit){
    return true;
  }
  else{
    doProgressBar();
    return false;
  }
}