Hi,
I am new to Dojo and started with the Hello World tutorial. This all works fine but now I thought I would try to apply Dojo to my web pages dynamically. So I want to load dojo.js dynamically.

So I'm loading some Dojo CSS files and the Dojo Javascript library:

var html_doc = document.getElementsByTagName('head').item(0);

            css1=document.createElement("link")
            css1.setAttribute("rel", "stylesheet");
            css1.setAttribute("type", "text/css");
            css1.setAttribute("href", 'dojoroot/dijit/themes/tundra/tundra.css');
            html_doc.appendChild(css1);

            css2=document.createElement("link")
            css2.setAttribute("rel", "stylesheet");
            css2.setAttribute("type", "text/css");
            css2.setAttribute("href", 'dojoroot/dojo/resources/dojo.css');
            html_doc.appendChild(css2);

            var js = document.createElement('script');
            js.setAttribute('language', 'javascript');
            js.setAttribute('type', 'text/javascript');
            js.setAttribute('src', 'dojoroot/dojo/dojo.js');
            js.setAttribute('djConfig', 'parseOnLoad: true');
            html_doc.appendChild(js);

This all seems to work fine.
Of course I cannot use the dojo.js until it is loaded. So I'm using a timeout to create widgets only after the library is loaded. After the library loads I want to create a button similar to the hello world example.

dojo.require("dojo.widget.Button");
            var html_doc = document.getElementsByTagName('body').item(0);
            html_doc.setAttribute('class', 'tundra');

            var button = document.createElement('button');
            button.setAttribute('dojoType', 'dijit.form.Button');
            button.setAttribute('id', 'helloButton');
            button.appendChild(document.createTextNode("Click me!"));
            html_doc.appendChild(button);
            
            dojo.widget.createWidget(button);

The dojo.require causes an error message. In the console I see the following error message:
Fout: Could not load 'dojo.widget.Button'; last tried './widget/Button.js'
Regel: 565

Other widgets produce a similar error message. The button.js file does a exist but not in the searched location. It exists in dojoroot\dijit\form.

Any ideas why this library cannot be found?

Thanks and Regards,
Onno