var textcolours = Array( '#556630','#999999', '#808080', '#666666','#000000','#434243' );
            
            function flashtext() {
            
                var colour = Math.round( textcolours.length * Math.random() );
                document.getElementById( 'flashingtext' ).style.color = textcolours[ colour ];
            
            } 
            
            setInterval( 'flashtext()', 500 );