take advantage of createImage to set the position on creation. change point to pixel

git-svn-id: http://svn.openlayers.org/trunk/openlayers@159 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Tile/Image.js

@@ -24,18 +24,19 @@ OpenLayers.Tile.Image.prototype =
     draw:function() {
         OpenLayers.Tile.prototype.draw.apply(this, arguments);
         this.img = OpenLayers.Util.createImage(this.url,
-                                               this.size);
+                                               this.size,
+                                               null,
+                                               "absolute");
     },
 
     /**
      * @param OpenLayers.Pixel
      */
-    setPosition:function(point) {
+    setPosition:function(pixel) {
         if (this.img) {
-            this.img.style.top = point.y + "px";
-            this.img.style.left = point.x + "px";
-            this.img.style.position = "absolute";
-            this.position = point;
+            this.img.style.top = pixel.y + "px";
+            this.img.style.left = pixel.x + "px";
+            this.position = pixel;
         }
     },