function win(aUrl, aName, aWidth, aHeight, aScrollBars, aMenubar)
{
	var _top = (window.screen.availHeight - aHeight.replace("px", "")) /2;
	var _left = (window.screen.availWidth - aWidth.replace("px", "")) /2;
	var _win = window.open(aUrl, aName, "scrollbars=" + aScrollBars + ",menubar=" + aMenubar + ",width=" + aWidth + ",height=" + aHeight + ",left=" + _left + ",top=" + _top);
	_win.focus();
}