dojo.require("dojox.gfx"); // include an attacher conditionally dojo.requireIf(dojox.gfx.renderer == "svg", "dojox.gfx.svg_attach"); dojo.requireIf(dojox.gfx.renderer == "vml", "dojox.gfx.vml_attach"); dojo.requireIf(dojox.gfx.renderer == "silverlight", "dojox.gfx.silverlight_attach"); dojo.requireIf(dojox.gfx.renderer == "canvas", "dojox.gfx.canvas_attach");