// Detect if the browser is IE or not.
// If it is not IE, we assume that the browser is NS.
var IE = document.all ? true:false

// If NS -- that is, !IE -- then set up for mouse capture
if (!IE) document.captureEvents(Event.MOUSEMOVE)

// Set-up to use getMouseXY function onMouseMove
document.onmousemove = getMouseXY;

// Temporary variables to hold mouse x-y pos.s
var tempX = 0
var tempY = 0

// Main function to retrieve mouse x-y pos.s

function getMouseXY(e) {
  if (IE) { // grab the x-y pos.s if browser is IE
    tempX = event.clientX + document.body.scrollLeft
    tempY = event.clientY + document.body.scrollTop
  } else {  // grab the x-y pos.s if browser is NS
    tempX = e.pageX
    tempY = e.pageY
  }
  // catch possible negative values in NS4
  if (tempX < 0) { tempX = 0 }
  if (tempY < 0) { tempY = 0 }
  return true;
}

function showImagePreview(e) {

    var prevTable = document.getElementById('imagePreviewTable');

    if(prevTable != null) {

        var images = prevTable.getElementsByTagName('IMG');

        for(var i=0; i < images.length; i++) {
            if(images[i].id == 'previewImage') {
                images[i].src = e;
            }
        }

        prevTable.style.display = 'block';
        prevTable.style.left = (tempX + 20) + "px";
        prevTable.style.top = (tempY - 50) + "px";
    }
}

function hideImagePreview() {

    var prevTable = document.getElementById('imagePreviewTable');

    if(prevTable != null) {
        
        var images = prevTable.getElementsByTagName('IMG');

        for(var i=0; i < images.length; i++) {
            if(images[i].id == 'previewImage') images[i].src = '';
        }

        prevTable.style.display = 'none';
    }
}

function runde(x, n) {
  if (n < 1 || n > 14) return false;
  var e = Math.pow(10, n);
  var k = (Math.round(x * e) / e).toString();
  if (k.indexOf('.') == -1) k += '.';
  k += e.toString().substring(1);
  return k.substring(0, k.indexOf('.') + n+1);
}