function popup(mypage, mywinname, mywidth, myheight, mystatus){
	w=mywidth;
	h=myheight;
	LeftPosition=(screen.width)?(screen.width-w)/2:100;
	TopPosition=(screen.height)?(screen.height-h)/2:100;
	settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars=no,location=no,directories=no,status='+mystatus+',menubar=no,toolbar=no,resizable=no';
	win=window.open(mypage,mywinname,settings);
	if(win.focus){
		win.focus();
	}
}