eclipse project with ant

So yeah, I have this project that is built with an ant script. its compiles fine and all, but because it needs to be compiled with the ant script (the script can be run inside eclipse though), eclipse itself keeps showing me 95 errors in the project, its pretty annoying and im not even sure if more advanced features like refactoring etc. will work perfectly fine with a project with errors in it.

- So does any1 know if its possible to somehow tell eclipse to ignore those errors or something?