Removing Empty Lines from Text??

Is there an elegant way to remove excess blank lines from my form data? For example; if someone enters the following text and then press' the Submit button: ---- This is a some text This is more text, and yet even more.... ---- What I want to do is remove the excess white space and make it look like this? ---- This is a some text This is more text, and yet even more.... ---- My users may press <enter> too many times and I want to ensure clean text and formatting. Thanks. Jason