function OpenWinpre(){
	win=window.open("../../../pre/index.html","pre","toolbar=no,location=no,status=no,menubar=no,scrollbars=no,width=399,height=174");
	sx=399;
	sy=174;
	x=(screen.width-sx)/2;
	y=(screen.height-sy)/2;
	win.moveTo(x,y);
}