Useful Flash custom functions

Object.prototype.toString = function() {
	//set empty string to be displayed
	var string = "";
	//cycle through properties and functions
	for (var i in this) {
		//if not a function
		if (typeof (this[i]) != "function") {
			//add the property name and value to the string
			string += i+":"+this[i].toString()+", ";
		} else {
			//else add the function name and "Function"
			string += i+":Function, ";
		}
	}
	//don't include last comma and space in final string
	string = string.substring(0, string.length-2);
	return string;
};
MovieClip.prototype.lineHitTest = function(x1, y1, x2, y2, pre) {
	//find difference in x
	var x = x1-x2;
	//find difference in y
	var y = y1-y2;
	//find distance between points
	var dis = Math.sqrt(x*x+y*y);
	//when pre(precision) equals 2, it checks every 2 points
	//therefore, the number of point equals dis/pre
	var num = dis/pre;
	//vars to hold current point
	var tx, ty;
	for (var i = 1; i<=num; i++) {
		//if pre equals 2 and distance is ten, then 
		//we find a point 1/5 of the way down the line.
		tx = x2+i*x/num;
		ty = y2+i*y/num;
		//if the point(tx, ty) touches the movieclip we're testing
		if (this.hitTest(tx, ty)) {
			//return true because the movieclip is on the line
			return true;
		}
	}
	//return false because none of the tested points hit the movieclip
	return false;
};
Object.prototype.clone = function() {
	//empty object
	var temp = new Object();
	//for each propety in the going-to-be-cloned object
	for (i in this) {
		//copy property name with value to new object
		temp[i] = this[i];
	}
	return temp;
};
Array.prototype.clone = function() {
	//empty array
	var temp = new Array();
	//for each value in the going-to-be-cloned array
	for (i in this) {
		//copy value with index to new object
		temp[i] = this[i];
	}
	return temp;
};
angleFromTo = function (x1, y1, x2, y2) {
	//find change in x
	var x = x2-x1;
	//find change in y
	var y = y2-y1;
	//Math.atan2 returns angle in radians; Math.PI/180 converts to degrees
	return Math.atan2(y, x)/(Math.PI/180);
};
distanceFromTo = function (x1, y1, x2, y2) {
	//find change in x
	var x = x2-x1;
	//find change in y
	var y = y2-y1;
	//use pythagorean theorem to find distance
	return Math.sqrt(x*x+y*y);
};
vectorToHorz = function (ang, dis) {
	var rads = ang/(180/Math.PI);
	//returns x-component of a vector of dis magnitude at ang angle
	return dis*Math.cos(rads);
};
vectorToVert = function (ang, dis) {
	var rads = ang/(180/Math.PI);
	//returns y-component of a vector of dis magnitude at ang angle
	return dis*Math.sin(rads);
};

#include "customFunctions.as"
arrow.onEnterFrame = function() {
	this._rotation = 0;
	var ang = angleFromTo(0, 0, this._xmouse, this._ymouse);
	var dis = distanceFromTo(0, 0, this._xmouse, this._ymouse);
	xm.text = (this._xmouse);
	funcbox.text = "vectorToHorz("+Math.round(ang)+", "+Math.round(dis)+")";
	vth.text = Math.round(vectorToHorz(ang, dis));
	ym.text = (this._ymouse);
	funcbox2.text = "vectorToVert("+Math.round(ang)+", "+Math.round(dis)+")";
	vtv.text = Math.round(vectorToVert(ang, dis));
	this._rotation = ang;
};

#include "customFunctions.as"
ball.onEnterFrame = function() {
	x1 = Math.random()*Stage.width;
	y1 = Math.random()*Stage.height;
	x2 = Math.random()*Stage.width;
	y2 = Math.random()*Stage.height;
	hit = this.lineHitTest(x1, y1, x2, y2, 4);
	_root.clear();
	_root.lineStyle(3, 0x209702);
	_root.moveTo(x1, y1);
	_root.lineTo(x2, y2);
	if (hit) {
		hitbox.text = "hit";
	} else {
		hitbox.text = "no hit";
	}
};

#include "customFunctions.as"
num.onChanged = function() {
	testObj.num = this.text;
	updateString();
};
str.onChanged = function() {
	testObj.str = this.text;
	updateString();
};
but1.onRelease = function() {
	testObj.bool = true;
	updateString();
};
but2.onRelease = function() {
	testObj.bool = false;
	updateString();
};
updateString = function () {
	string.text = testObj.toString();
};
 
testObj = {num:5, str:"test", bool:true};
num.text = testObj.num;
str.text = testObj.str;
num.restrict = "0-9";
updateString();