diff --git a/lib/term.js b/lib/term.js
index 829a929c..e8f22554 100644
--- a/lib/term.js
+++ b/lib/term.js
@@ -805,24 +805,26 @@ Terminal.prototype.bindMouse = function() {
 
     // should probably check offsetParent
     // but this is more portable
-    while (el !== self.document.documentElement) {
+    while (el && el !== self.document.documentElement) {
       x -= el.offsetLeft;
       y -= el.offsetTop;
-      el = el.parentNode;
+      el = 'offsetParent' in el
+        ? el.offsetParent
+        : el.parentNode;
     }
 
     // convert to cols/rows
     w = self.element.clientWidth;
     h = self.element.clientHeight;
-    x = ((x / w) * self.cols) | 0;
-    y = ((y / h) * self.rows) | 0;
+    x = Math.round((x / w) * self.cols);
+    y = Math.round((y / h) * self.rows);
 
     // be sure to avoid sending
     // bad positions to the program
     if (x < 0) x = 0;
-    if (x > self.cols) x = self.cols;
+    if (x >= self.cols) x = self.cols - 1;
     if (y < 0) y = 0;
-    if (y > self.rows) y = self.rows;
+    if (y >= self.rows) y = self.rows - 1;
 
     // xterm sends raw bytes and
     // starts at 32 (SP) for each.
@@ -832,10 +834,9 @@ Terminal.prototype.bindMouse = function() {
     return {
       x: x,
       y: y,
-      down: ev.type === 'mousedown',
-      up: ev.type === 'mouseup',
-      wheel: ev.type === wheelEvent,
-      move: ev.type === 'mousemove'
+      type: ev.type === wheelEvent
+        ? 'mousewheel'
+        : ev.type
     };
   }
 
@@ -849,6 +850,7 @@ Terminal.prototype.bindMouse = function() {
     self.focus();
 
     // fix for odd bug
+    //if (self.vt200Mouse && !self.normalMouse) {
     if (self.vt200Mouse) {
       sendButton({ __proto__: ev, type: 'mouseup' });
       return cancel(ev);
@@ -870,6 +872,10 @@ Terminal.prototype.bindMouse = function() {
     return cancel(ev);
   });
 
+  //if (self.normalMouse) {
+  //  on(self.document, 'mousemove', sendMove);
+  //}
+
   on(el, wheelEvent, function(ev) {
     if (!self.mouseEvents) return;
     if (self.x10Mouse