function NewWindow(mypage, myname, wd, ht, scroll) {
	var wtop = (screen.width - wd) / 2;
	var wleft = (screen.height - ht) / 2;
	winprops = 'height='+ht+',width='+wd+',top='+wtop+',left='+wleft+',scrollbars='+scroll+',resizable=1';
	win = window.open(mypage, myname, winprops)
}