function getWindow(l,n,w,h){
	var newX = (screen.availWidth - w) / 2;
    var newY = (screen.availHeight - h) / 2;
	nW = window.open(l, n, "status=yes, resizable=yes,toolbar=no,menubar=no,location=no,dependent=no,scrollbars=yes,width="+w+",height="+h+"");
	if (nW) {
		nW.moveTo(newX, newY);
		nW.focus();
		return true;
	} else {
		return false;
	}
}