Tip: SyntaxHighlighter

SyntaxHighlighter is an open source Java Script client side code syntax highlighter.

SyntaxHighlighter uses separate syntax files called brushes to define its highlighting functionality.

You can download the latest version or watch demos of SyntaxHighlighter here

Demo

                                    // SyntaxHighlighter makes your code snippets beautiful without tiring your servers.
                                    // http://alexgorbatchev.com
                                    var setArray = function(elems) {
                                        this.length = 0;       
                                        push.apply(this, elems);
                                        return this;
                                    }