javascript/dragndrop.html at master · rutkat/javascript · GitHub

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<!DOCTYPE html>
<html>
<head>
<style>
img { position: absolute; }
</style>

<script>
window.onload = function() {

  movMeId = document.getElementById("ImgMov");
  movMeId.style.top = "80px";
  movMeId.style.left = "80px";

  document.onmousedown = coordinates;
  document.onmouseup = mouseup;

  function coordinates(e) {
    if (e == null) { e = window.event;}

    // e.srcElement holds the target element in IE, whereas e.target holds the target element in Firefox
    // Both properties return the HTML element the event took place on.

    var sender = (typeof( window.event ) != "undefined" ) ? e.srcElement : e.target;

    if (sender.id=="ImgMov") {
      mouseover = true;
      pleft = parseInt(movMeId.style.left);
      ptop = parseInt(movMeId.style.top);
      xcoor = e.clientX;
      ycoor = e.clientY;
      document.onmousemove = moveImage;
      return false;
    }
    return false;
  }

  function moveImage(e) {
    if (e == null) { e = window.event; }
    movMeId.style.left = pleft+e.clientX-xcoor+"px";
    movMeId.style.top = ptop+e.clientY-ycoor+"px";
    return false;
  }

  function mouseup(e) {
    document.onmousemove = null;
  }
}
</script>
</head>

<body>
  <img id="ImgMov" src="http://placehold.it/100x100&text=JS" width="64" height="64">
  <p>Drag and drop around the image in this page.</p>
</body>

</html>