diff --git a/lib/OpenLayers/Layer/Grid.js b/lib/OpenLayers/Layer/Grid.js
index babad41b69..e5fa551c9f 100644
--- a/lib/OpenLayers/Layer/Grid.js
+++ b/lib/OpenLayers/Layer/Grid.js
@@ -350,8 +350,8 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
         // and translate the layer div as necessary
 
         var size = this.map.getSize();
-        var lcX = parseInt(this.map.layerContainerDiv.style.left);
-        var lcY = parseInt(this.map.layerContainerDiv.style.top);
+        var lcX = parseInt(this.map.layerContainerDiv.style.left, 10);
+        var lcY = parseInt(this.map.layerContainerDiv.style.top, 10);
         var x = (lcX - (size.w / 2.)) * (scale - 1);
         var y = (lcY - (size.h / 2.)) * (scale - 1);
 
@@ -368,7 +368,7 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
      * {Number} The resolution scale.
      */
     getResolutionScale: function() {
-        return parseInt(this.div.style.width) / 100;
+        return parseInt(this.div.style.width, 10) / 100;
     },
 
     /**
@@ -830,8 +830,8 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
         var tlLayer = this.grid[0][0].position.clone();
         tlLayer.x *= scale;
         tlLayer.y *= scale;
-        tlLayer = tlLayer.add(parseInt(this.div.style.left),
-                              parseInt(this.div.style.top));
+        tlLayer = tlLayer.add(parseInt(this.div.style.left, 10),
+                              parseInt(this.div.style.top, 10));
         var offsetX = parseInt(this.map.layerContainerDiv.style.left);
         var offsetY = parseInt(this.map.layerContainerDiv.style.top);
         var tlViewPort = tlLayer.add(offsetX, offsetY);