function WindowSize(){
	
	this.w = WindowSize_getW();
	this.h = WindowSize_getH();
	this.aw = WindowSize_getAvailW();
	this.ah = WindowSize_getAvailH();
	
	function WindowSize_getW(){
		return screen.width;
	}
	
	function WindowSize_getH(){
		return screen.height;
	}

	function WindowSize_getAvailW(){ 
		return screen.availWidth;
	}
	
	function WindowSize_getAvailH(){
		return screen.availHeight;
	}
	
}