Hi, i got a class that updates and renders a button, wich i created.

My Button class looks like this:

Code:
var Button = function(x,y,width,height,text){
	
	this.rect = new Rectangle(x,y,width,height);
	
	this.text = text;
	
	this.hover = true;
	this.pressed = false;
	
	this.update = function(input){
		this.hover = this.rect.Contains(input.x, input.y);
		
		if(this.hover && input.m_left && !this.pressed){
			this.pressed = true;
			this.clicked();
		}
		
		if(!input.m_left){
			this.pressed = false;
		}
	
		
	};
	
	this.render = function(ctx){
		this.hover? this.rect.Draw(ctx, "blue"):this.rect.Draw(ctx, "red");
	};
	
	this.clicked = function(){};
	
};
and the basic class:

Code:
var Basic = function(){
	this.x = 100;
	
	this.b1 = new Button(0,0,200,50,"lol");
	this.b1.clicked = function(){
		this.rect.x += Basic.x;
		alert(this.x);
	};
	
	this.update = function(input){
		this.b1.update(input);
	};
	
	this.render = function(ctx){
		this.b1.render(ctx);
	};
};
The problem is, that Basic.x (i also tried this.x) is undefined, because the clicked funtion is executed in the button class.
How can i access elements from the Basic class, without giving them as argument to the Button class?

Thx