function newwin(url, windowname, widthofscreen, heightofscreen, scrollyesorno) {
	var winl = (screen.width - widthofscreen) / 2;
	var wint = (screen.height - heightofscreen) / 2;
	windowproperties = 'height='+heightofscreen+',width='+widthofscreen+',top='+wint+',left='+winl+',scrollbars='+scrollyesorno+',resizable'
	win = window.open(url, windowname, windowproperties)
	if (parseInt(navigator.appVersion) >= 4) { 
		win.window.focus(); 
	}
}