2 height draggable menu

app.js

var win = Ti.UI.createWindow({
    backgroundColor: '#333'
});

var menu = Ti.UI.createView({
	backgroundColor:'blue',
	top:Ti.Platform.displayCaps.platformHeight-50,
	bottom:0
});

menu.addEventListener('touchmove', function(evt) {
    var point = menu.convertPointToView({ x: evt.x, y: evt.y }, win);	
   	
   	menu.top = point.y;
    	
});

menu.addEventListener('touchend', function(e){
	 if(menu.top <((Ti.Platform.displayCaps.platformHeight/2)+100) && menu.top >((Ti.Platform.displayCaps.platformHeight/2))){
   	 		menu.top = Ti.Platform.displayCaps.platformHeight/2;
   	} else if (menu.top >(Ti.Platform.displayCaps.platformHeight/2)+100){
   		menu.top = Ti.Platform.displayCaps.platformHeight-50;
   	} else if (menu.top <((Ti.Platform.displayCaps.platformHeight/2))){
   		menu.top = 100;
   	}
})

win.add(menu);
 
win.open();