function openWindow(url, width,height,name)
{
	szerokosc=width;
	wysokosc=height;

	var okno = window.open(url,name,"toolbar=no,menubar=no,personalbar=no,Width="+szerokosc+",Height="+wysokosc+",scrollbars=yes");
	okno.focus();
	okno.moveTo((screen.availWidth/2)-(szerokosc/2),(screen.availHeight/2)-(wysokosc/2));	

}