createEmptyMovieClip screwy | help please

[quadzilla]

i have a swf, that creates 12 buttons dynamically from sites.txt by duplicating b_transmitter, then it is positioned onscreen. when a button is Roledlover i want to create a movie clip that is 50px X 50px and positioned on top of the button that created it and centered.
ive had a go, but its a bit screwy. the newly created movieclip inherits some of the button features such as the rollover function and wont center on the button but rather top left aligned.
the swf can be found http://www.cghub.co.nz/ethermap/test/index.htm

b_transmitter._visible= false;
//hide transmitter. will be duplicated

files = new Array(); 
lv = new LoadVars(); 
lv.onLoad = function() {
	count=0;
	// transmitters in format of id|name|easting|northing|range
	fl = this.transmitters;
	files = fl.split("|"); 
	c = files.length-1; 
	for (i=0; i<c; i++) {
		duplicateMovieClip ("b_transmitter", files[i], i);
		button = eval(files[i]);
		button.location_id = files[i];
		i++;
		button.location_name = files[i];
		i++;
		var_easting = files[i];
		var_x = 2730000 - var_easting;
		var_x_percent = var_x/120000;
		var_x_percent = 1-var_x_percent;
		var_x = 1200 * var_x_percent;
		setProperty (button, _x, var_x);
		button.easting = var_x;
		i++;
		var_northing = files[i];
		var_y = 6520000 - var_northing;
		var_y = var_y/100;
		setProperty (button, _y, var_y);
		i++;
		button.location_range = files[i];
		trace(button+ "count=" + count);
		button.onRollOver = function () {
			reset_buttons();
			this.nextFrame();
			var button_x = this._x
			var button_y = this._y
			this.createEmptyMovieClip("range",this.getNextHighestDepth());
			with (this.range) {
				_x = 0;
				_y = 0;
				trace("button_x - " + button_x);
				//drawCircle(size);
					lineStyle(0.1, 0x97BE6B, 100);
					beginFill(0x0000FF,25);
					moveTo(0, 0);
					lineTo(50, 0);
					lineTo(50, 50);
					lineTo(0, 50);
					lineTo(0, 0);
			}
		};
		
		button.onRollOut = function() {
//			this.range.removeMovieClip();
		}
		count=count+1;
	}
	
}
lv.load("sites.txt"); 

reset_buttons = function(){
	c = files.length-1; 
	for (i=0; i<c; i++) {
		_root[files[i]].gotoAndStop(1);
		i=i+4
	}
}

[madzigian]

they are not aligning the way you want them because your circle buttons have a centered registration point. Dynamically created mc's have a top left registration point. The mc's are inheriting properties, but you are creating it INSIDE the button... So either fix the reg point of your circles... and target the right layer to create the mc's on

or.....

try using this to create your square mc's instead:

MovieClip.prototype.drawRect = function(x, y, w, h, f, fa, s, sa) {
	var _mc:MovieClip = this;
	_mc.moveTo(x, y);
	_mc.lineStyle(.1, s, sa);
	_mc.beginFill(f, fa);
	_mc.lineTo(x+w, y);
	_mc.lineTo(x+w, y+h);
	_mc.lineTo(x, y+h);
	_mc.lineTo(x, y);
	_mc.endFill();
};


button.onRollOver = function(){
     //  blah blah blah....
     var range = _parent.createEmptyMovieClip('range', _parent.getNextHighestDepth());
     range._x = this._x;
     range._y = this._y;
     range.drawRect(-25, -25, 50, 50, 0x0000FF, 25, 0x97BE6B, 100);
    // blah blah blah...
};

button.onRollOut = function(){
      range.removeMovieClip();
};

[quadzilla]

they are not aligning the way you want them because your circle buttons have a centered registration point. Dynamically created mc's have a top left registration point. The mc's are inheriting properties, but you are creating it INSIDE the button... So either fix the reg point of your circles... and target the right layer to create the mc's on

or.....

try using this to create your square mc's instead:

MovieClip.prototype.drawRect = function(x, y, w, h, f, fa, s, sa) {
	var _mc:MovieClip = this;
	_mc.moveTo(x, y);
	_mc.lineStyle(.1, s, sa);
	_mc.beginFill(f, fa);
	_mc.lineTo(x+w, y);
	_mc.lineTo(x+w, y+h);
	_mc.lineTo(x, y+h);
	_mc.lineTo(x, y);
	_mc.endFill();
};


button.onRollOver = function(){
     //  blah blah blah....
     var range = _parent.createEmptyMovieClip('range', _parent.getNextHighestDepth());
     range._x = this._x;
     range._y = this._y;
     range.drawRect(-25, -25, 50, 50, 0x0000FF, 25, 0x97BE6B, 100);
    // blah blah blah...
};

button.onRollOut = function(){
      range.removeMovieClip();
};

ahhh, i shouldve used "_parent" not "this". i see the light.. was soo close yet so far!

all sorted now i think

thanks