mouse movement control and scrolling

hi, i have a problem.
i am a total beginner in any programing.
i started making game, in which main char will be centered on the screen and surrounding will scroll as he moves. You will control his moving with mouse, when the mouse button is pressed he will move in direction of mouse cursor with speed determined by mouse cursor distance from main char.
my code is:
onClipEvent(load)
{
xspeed = 0;
yspeed = 0;


onClipEvent(enterFrame)
{
onMouseDown = function()
{
xspeed = (xspeed - (this._x - _root._xmouse))*0.1;
yspeed = (yspeed - (this._y - _root._ymouse))*0.1;
}
onMouseUp = function()
{
xspeed = 0
yspeed = 0

}
_root.level._x -=xspeed;
_root.level._y -=yspeed;
}

however, he moves only when u press the button. But i want him to change direction/speed as you hold pressed mouse button and move mouse around.
How can i make this happen?
tnx

got it. no need to help anymore.

tnx anyway ^^

Glad to see you got it working, haha