var textcolours = Array( '#FFFF00', '#EEEE00', '#DDDD00', '#CCCC00', '#BBBB00', '#AAAA00' );

            function flashtext() {

                var colour = Math.round( textcolours.length * Math.random() );
                document.getElementById( 'flashingtext' ).style.color = textcolours[ colour ];

            }

            setInterval( 'flashtext()', 50 );