Right click doesn't open the context menu close to the block on IE

What steps will reproduce the problem?
1. drop a block
2. right click

What is the expected output? What do you see instead?

the context menu should appear close to the block

instead if appears at 0, 0.

this is related to issue 164, because scrollX/Y is used to calculate where to 
put the context menu.

this patch fixes the issue:

 svn diff utils.js 
Index: utils.js
===================================================================
--- utils.js    (revision 1380)
+++ utils.js    (working copy)
@@ -288,8 +288,8 @@
  */
 Blockly.convertCoordinates = function(x, y, toSvg) {
   if (toSvg) {
-    x -= window.scrollX;
-    y -= window.scrollY;
+    x -= window.scrollX || window.pageXOffset;
+    y -= window.scrollY || window.pageYOffset;
   }
   var svgPoint = Blockly.svg.createSVGPoint();
   svgPoint.x = x;
@@ -300,8 +300,8 @@
   }
   var xy = svgPoint.matrixTransform(matrix);
   if (!toSvg) {
-    xy.x += window.scrollX;
-    xy.y += window.scrollY;
+    xy.x += window.scrollX || window.pageXOffset;
+    xy.y += window.scrollY || window.pageYOffset;
   }
   return xy;
 };
@@ -313,8 +313,11 @@
  * @return {!Object} Object with .x and .y properties.
  */
 Blockly.mouseToSvg = function(e) {
-  return Blockly.convertCoordinates(e.clientX + window.scrollX,
-      e.clientY + window.scrollY, true);
+  var scrollX = window.scrollX || window.pageXOffset,
+      scrollY = window.scrollY || window.pageYOffset;
+
+  return Blockly.convertCoordinates(e.clientX + scrollX,
+      e.clientY + scrollY, true);
 };

 /**

Please use labels and text to provide additional information.

Original issue reported on code.google.com by luismarianoguerra@gmail.com on 27 Sep 2013 at 9:52

renciso218 / blockly

Right click doesn't open the context menu close to the block on IE #165