function credits()
{
	window.open("credits.htm", "credit", "directories=no,scrollbars=auto,status=yes,width=400,height=480")

}

function sciQuiz()
{
	var isMac = navigator.userAgent.indexOf("Mac") != -1;
	if (!(document.all) || isMac)
	{
		alert("You need a browser that supports Dynamic HTML to play the Quiz. Sorry, SciQuiz doesn't work with Macintosh browsers at present.");

	}
	else
	{
		top.location.replace("../scitest/frame.htm");
	}



}