Need help with scroll :O)

I’ve made some scroll-text to use with the news-section on my website. Everytime you click on the “scroll-down button” it scrolls down, but only by one line of text. I would really love to be able to hold down the button and then the text would scrool until release. Unfortunately I don’t know how to do this. If Anybody out there know how its done please tell me :O)

This is the piece of [color=black]action i[/color] use on my buttons :

[color=blue]on (release) {
scrolltext.scroll -= 1;[/color][color=blue]

}

[color=black]My website by the way : http://www.thebasement.dk[/color][/color]