var win = null;
function NewWindow(mypage,myname,w,h){
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = 0;
	settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars=no,resizable';
	win = window.open(mypage,myname,settings);
	if(win.window.focus){
		win.focus();
	}
}