spelling without aspell/pspell?

Hi, I just found a really nice set of javascripts for spell-checking a textarea before submitting, which is really nice, BUT is shell_exec()'s to aspell, which neither my host or my staging server has installed. It works with both PHP and Perl too. There's a demo here: http://www.netjs.com/speller/ What I'd like to know is if there's any other PHP-oriented solutions to spell checking that I might be able to integrate (with a fair amount of hacking) into this solution -- or perhaps a complete solution that doesn't require any compiling or libraries exists???? Justin French