var obj = document.getElementById("header");

Given the above code snippet, I should be able to wire event handlers. For example, I can wire onMouseDown to the mouse down event, the issue is that Visual Studio does not display this in the Intellisense.

I'm trying something such as:

obj.onmousedown = mousestatus;

Based on a book I'm reading, the code is valid (at least it works) therefore I see no reason why Intellisense is not picking it up.

I've tried this on both a standalone Javascript file, as well as an MVC project to no luck.

Is there anything I'm doing wrong - or is there a way to resolve this?