function openWindow(mypage, myname, w, h, t, l, scroll,resizable) {
	if (t == 0 || l == 0){
		var winl = (screen.width - w) / 2;
		var wint = (screen.height - h) / 2;
	}else{
		var winl = l;
		var wint = t;
	}

	var winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable='+resizable+',toolbar=no'
	var win = window.open(mypage, myname, winprops)
		if (parseInt(navigator.appVersion) >= 4)
		{
			win.window.focus();
		}
}