dojo addOnLoad
<html> <head> <link rel="StyleSheet" type="text/css" href="js/dojo/dijit/themes/tundra/tundra.css"> <script type="text/javascript"> var djConfig = { baseScriptUri : "js/dojo/", parseOnLoad : true }; </script> <script type="text/javascript" src="js/dojo/dojo/dojo.js"></script> <script> dojo.require("dojo.parser"); dojo.require("dijit.Dialog"); dojo.addOnLoad(showDialogs); function showDialogs() { dijit.byId("dialog1").show(); } </script> </head> <body> <div dojoType="dijit.Dialog" id="dialog1" title="dialog1" href="yourContentPageHere.htm"></div> </body> </html>