bootcamp problem

My laptop was shutoff by accident while I was in the process of using bootcamp to add Windows. When I restarted the Windows disk was still in the drive and it started loading but gave me a message saying the drive was not formatted properly. I restarted and ejected the Windows disk but now it won't start in OSX... keeps asking for a bootable device. I've tried rebooting while pressing the option key but it doesn't give me any other options.

Any help appreciated.