if(!dojo._hasResource["dojox.sketch"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code. dojo._hasResource["dojox.sketch"] = true; dojo.provide("dojox.sketch"); try{ // fix IE image caching issue document.execCommand("BackgroundImageCache", false, true); }catch(e){ } dojo.require("dojox.xml.DomParser"); dojo.require("dojox.sketch.UndoStack"); dojo.require("dojox.sketch.Figure"); dojo.require("dojox.sketch.Toolbar"); }