I would like to incorporate dhtmlxTree into a project I’m working on, but first as an experiment, I set up a small sample page shown below. However, even after following the initialization steps in the documentation word by word I’m still getting a “Cannot read property ‘addEventListener’ of null” error when I go to load the page. The source of the error is coming from the dhtmlx source code. Has anyone ran into something like this before or can tell me what I am doing wrong below?
[code]File Tree Demo [/code]