javascript requestAnimationFrame w klasie

function klasa(argumenty_nevermind)
{

	var requestAnimationFrame= window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;
	
	this.running=false;

	this.start = function()
	{
		this.running= true;
		this.requestAnimationFrame( this.loop() );
	}
	
	this.loop = function()
	{
		if( this.running)
		{
			this.requestAnimationFrame( this.loop() );
		}
	}

this.stop=function(){this.isrunning=false;}

}

this.requestAnimationFrame( this.loop );