Angularjs output html summary

I have a list of articles. The html is like "<p align="center"><img alt="" src="/updateimage/20120330/[login to view URL]" /></p> <p align="left">dummy text dummy textdummy textdummy textdummy textdummy textdummy text</p>" when i list the articles, i like to output a summary striping all the html tags and only output the text with 100 words limits, such as "dummy text dummy textdummy textdummy textdummy textdummy textdummy text" I m using angularjs.