如何组合extjs图形元素和画架元素

I want to combine an extjs app that creates a window and an easelJS canvas but when I try to load them at the same time the window's get completely screwed up :( here is my code. is there a conflict with movable windows? Do I have to put my windows in a container? I'm brand new to this stuff, i've been tinkering with extjs for about a week and only been messing with easel js for about 2 days. I'm only a week.5 experiences with JS so if my question seems too noob my apologies. I want to combine an extjs app that creates a w