function getElem(id) { // just shortcut
	return document.getElementById(id)
}

var xPos, yPos;

function getImageXY(imgElem) {
  xPos = eval(imgElem).offsetLeft;
  tempEl = eval(imgElem).offsetParent;
    while (tempEl != null) {
     xPos += tempEl.offsetLeft;
     tempEl = tempEl.offsetParent;
    }
   yPos = eval(imgElem).offsetTop;
   tempEl = eval(imgElem).offsetParent;
     while (tempEl != null) {
      yPos += tempEl.offsetTop;
      tempEl = tempEl.offsetParent;
     }
}

function getImg(id) {
	getImageXY(getElem(id));
 	xPos=xPos+700;
	yPos=yPos+150;
}

function moveLayer(layerName){
	if(xPos && yPos) {
	 	xPos=xPos-150;
		yPos=yPos-100;
		getElem(layerName).style.left = xPos;
		getElem(layerName).style.top = yPos;
		getElem(layerName).style.display = 'block';
	}
}