function Limit(from, to){
	this.from = from;
	this.to = to;
	this.value = this.from;
	this.onmore = new DOMEvent();
	this.onless = new DOMEvent();
	this.onchange = new DOMEvent();
	this.TO_REACHED = false;
	this.FROM_REACHED = true;
	this.MORE_VALUE = 0;
	this.LESS_VALUE = 0;
}
Limit.prototype.change = function(val){
	if(val == 0)
		return;
	var value = val;
	this.TO_REACHED = false;
	this.FROM_REACHED = false;
	value = this.checkFrom(value);
	value = this.checkTo(value);
	this.value += value;
	this.onchange.fire();
	if(this.TO_REACHED){
		this.onmore.fire();
	}
	if(this.FROM_REACHED){
		this.onless.fire();
	}
}
Limit.prototype.setValue = function(val){
	var value = val - this.from;
	this.change(value);
}
Limit.prototype.checkTo = function(val){
	var value = val;
	if(this.value + value >= this.to){
		value = this.to - this.value;
		this.MORE_VALUE = value;
		this.TO_REACHED = true;
	}
	return value;
}
Limit.prototype.checkFrom = function(val){
	var value = val;
	if(this.value + value <= this.from){
		//toConsole(this.value);
		value = -this.value + this.from;
		this.LESS_VALUE = value;
		this.FROM_REACHED = true;
	}
	return value;
}