function WinPopup(name) {
	var left,top;
	if (parseInt(navigator.appVersion)>=4) {
		left = screen.width/2 - 740/2;
		top = screen.height/2 - 600/2;
	} else {
		left = 150;
		top = 150;
	}
	window.open('',name,'height=600,width=740,resizable=no,scrollbars=yes,screenX='+left+',left='+left+',screenY='+top+',top='+top);
	return true;
}