Zooming At Specific point

Hi

i started a full flash website

i have problem in my work

in this site
johnwest.com.au

if you Rollover any object, whole Screen zoom into that point !
can you help me?
tnx

i mean i want this code

Use a movieclip's _xscale and _yscale properties:

Actionscript Code:

normalScale = mc._xscale;
targetScale = mc._xscale+100;
speed = 5;

mc.onRollOver = function(){
    delete this.onEnterFrame;
    mc.onEnterFrame = function(){
        if(this._xscale < targetScale){
            this._xscale += speed;
            this._yscale += speed;
        } else {
            delete this.onEnterFrame;
        }
    }
}

mc.onRollOut = function(){
    delete this.onEnterFrame;
    mc.onEnterFrame = function(){
        if(this._xscale > normalScale){
            this._xscale -= speed;
            this._yscale -= speed;
        } else {
            delete this.onEnterFrame;
        }
    }
}

tnx for replaying
but i want to zoom specific point (x,y)
like this pic
http://i.imgur.com/1KK8d.jpg

when i Rollover on button , the picture zoom in button position
tnx