Browser Compatibility Issue IE 6-8

I have a wordpress plugin that works well in all browsers except Internet Explorer. The plugin uses the HTML5 Canvas Tag. I'd like to find a functional solution for IE 6-8, such as "excanvas" code or some other work-around. The objects in the frame need to be draggable and the lists in the floating boxes need to be readable. The plugin works acceptably in Chrome and Firefox. If you compare the application's function in Chrome/Firefox vs. IE, you will see my issues. [login to view URL] As a list they are: 1. Objects are not draggable once placed in the grid. 2. The quote menu does not display the plant list correctly. 3. The drawing tools under the shapes tab do not function.