Shortening a Script

Is the away to create functions and apply it to movie clips for example, if I have four movie clips home, visit, products, contact us how could I when I rollover home make it enlarge and the others get smaller and fade slightly. this is the code I have now.
Say I write
enlarge = function () {
this._xscale = 200;
this._yscale = 200;
};
and
shirnk = function () {
this._xscale = 50;
this._yscale = 50;
this._alpha =25;
};
how would I apply it to the script below to shorten it.

home.onRollOver = function() {
this._xscale = 200;
this._yscale = 200;
visit._xscale = 50;
visit._yscale = 50;
visit._alpha = 25;
products._xscale = 50;
products._yscale = 50;
products._alpha = 25;
contact._xscale = 50;
contact._yscale = 50;
contact._alpha = 25;
};
home.onRollOut = function() {
this._xscale = 100;
this._yscale = 100;
visit._xscale = 100;
visit._yscale = 100;
visit._alpha = 100;
products._xscale = 100;
products._yscale = 100;
products._alpha = 100;
contact._xscale = 100;
contact._yscale = 100;
contact._alpha = 100;
};