javascript is essential in the creation of powerful web sites and applications. In Practical and Effective javascript, instructor Joe Marini presents the next level of features that experienced developers need to streamline their workflows and introduce dynamic new functions to their projects. Joe teaches tips for improving javascript performance, ways to separate programming behavior from page content, and principles for understanding the modern DOM event model. Finally, Joe introduces some of the more advanced concepts recently built into javascript. An understanding of the javascript language is a prerequisite for this course, which includes exercise files.