Movement mouvie clip

Hello fellows,

I am busy building a navigation based on the principal of moving to each new page by moving the hole stage left or right, up and down. What is clear to me is that I have to create a over size movie clip and a function.
I tried this script:

function moveObject (objecttoMove, newPosition){
objecttoMove.onEnterFrame=function(){
this._x-=(this._x-newPosition)*.5
}
}

which enables me to move only horizontally or vertically or diagonal but not all together.

Can some one help me with a god advise, a simple one if possible?