source: drbl_ui/flow_chart/clonezilla_mode.files/gif_1.js @ 157

function ViewMgrSetRasterLocation(pageID, shapeID, pinX, pinY)
{
  clickMenu ();

  var rasterImage = document.images("RasterImage");

  var imageLeft = 0;
  var imageRight = imageLeft + rasterImage.offsetWidth;
  var imageTop = 0;
  var imageBottom = imageTop + rasterImage.offsetHeight;
  
  var xLong = parent.ConvertXorYCoordinate(pinX, viewMgr.visBBoxLeft, viewMgr.visBBoxRight, imageLeft, imageRight, 0);
  var yLong = parent.ConvertXorYCoordinate(pinY, viewMgr.visBBoxBottom, viewMgr.visBBoxTop, imageTop, imageBottom, 1);
  
  var pixelWidth = document.body.scrollWidth;
  var pixelHeight = document.body.scrollHeight;

  var clientWidth = document.body.clientWidth;
  var clientHeight = document.body.clientHeight;
  var halfClientWidth = clientWidth;
  var halfClientHeight = clientHeight;

  xLong = xLong + rasterImage.offsetLeft;
  yLong = yLong + rasterImage.offsetTop;
  var xScrollAmount = 0;
  var yScrollAmount = 0;

  var xPrevScrollAmount = document.body.scrollLeft;
  var yPrevScrollAmount = document.body.scrollTop;

  var arrowHalfWidth = arrowdiv.clientWidth / 2;
  var arrowHeight = arrowdiv.clientHeight;

  if ((xLong - arrowHalfWidth) < xPrevScrollAmount)
  {
    // X off left of screen.
    document.body.scrollLeft = xLong - arrowHalfWidth;
  }
  else if ((xLong + arrowHalfWidth) > (clientWidth + xPrevScrollAmount))
  {
    // X off right of screen. 
    document.body.scrollLeft = xLong - clientWidth + xPrevScrollAmount + arrowHalfWidth;
  }

  if (yLong < yPrevScrollAmount)
  {
    // Y off top of screen.
    document.body.scrollTop = yLong;
  }
  else if ((yLong + arrowHeight) > (clientHeight + yPrevScrollAmount))
  {
    // Y off bottom of screen. 
    document.body.scrollTop = yLong - clientHeight + yPrevScrollAmount + arrowHeight;
  }

  arrowdiv.style.posLeft = xLong - arrowHalfWidth;
  arrowdiv.style.posTop = yLong;
  arrowdiv.style.visibility = "visible";

  setTimeout( "parent.hideObject(arrowdiv)", 0 );
  setTimeout( "parent.showObject(arrowdiv)", 1 );
  setTimeout( "parent.hideObject(arrowdiv)", 2000 );
}