//生成一个各元素为undefined的二维数组
private function create2Array(width:Number, height:Number):Array {
	var i;
	var f_Array = new Array();
	for (i=0; i<width; i++) {
		var n_Array = new Array(height);
		f_Array.push(n_Array);
	}
	return f_Array;
}
//生成一个在指定范围内指定大小的随机数组
private function createRandom1Array(long:Number, range:Number):Array {
	var i;
	var f_Array = new Array();
	for (i=0; i<long; i++) {
		f_Array[i] = random(range);
	}
	return f_Array;
}
//生成一个在指定范围内指定大小的二维随机数组
private function createRandom2Array(longWidth:Number, longHeight:Number, range:Number):Array {
	var i, j;
	var f_Array = create2Array(longWidth, longHeight);
	for (i=0; i<longWidth; i++) {
		for (j=0; j<longHeight; j++) {
			f_Array[i][j] = random(range);
		}
	}
	return f_Array;
}
//生成一个在指定范围内指定大小的无重复元素随机数组
private function createRandomNoRepeat1Array(long:Number, range:Number):Array {
	var i;
	var f_Array = new Array();
	var n_Array = new Array();
	for (i=0; i<range; i++) {
		n_Array[i] = new Object();
		n_Array[i].call = false;
	}
	i = 0;
	while (i<long) {
		var r = random(range);
		if (!n_Array[r].call) {
			n_Array[r].call = true;
			f_Array.push(r);
			i++;
		}
	}
	return f_Array;
}
//生成一个在指定范围内指定大小的无重复元素随机二维数组
private function createRandomNoRepeat2Array(longWidth:Number, longHeight:Number, count:Number):Array {
	if (count>longWidth*longHeight) {
		return null;
	}
	var i, j;
	var f_Array = new Array();
	var n_Array = create2Array(longWidth, longHeight);
	for (i=0; i<longWidth; i++) {
		for (j=0; j<longHeight; j++) {
			n_Array[i][j] = new Object();
			n_Array[i][j].call = false;
		}
	}
	i = 0;
	while (i<count) {
		var w = random(longWidth);
		var h = random(longHeight);
		if (!n_Array[w][h].call) {
			n_Array[w][h].call = true;
			f_Array.push([w, h]);
			i++;
		}
	}
	return f_Array;
}