var set = 21;     
	var pic = new Array(set);  
        
	pic[0] = "images/masthead/masthead1.jpg";
	pic[1] = "images/masthead/masthead2.jpg";
	pic[2] = "images/masthead/masthead3.jpg";
	pic[3] = "images/masthead/masthead4.jpg";
	pic[4] = "images/masthead/masthead5.jpg";
	pic[5] = "images/masthead/masthead6.jpg";
	pic[6] = "images/masthead/masthead7.jpg";
	pic[7] = "images/masthead/masthead8.jpg";
	pic[8] = "images/masthead/masthead9.jpg";
	pic[9] = "images/masthead/masthead10.jpg";
	pic[10] = "images/masthead/masthead11.jpg";
	pic[11] = "images/masthead/masthead13.jpg";
	pic[12] = "images/masthead/masthead14.jpg";
	pic[13] = "images/masthead/masthead15.jpg";
	pic[14] = "images/masthead/masthead16.jpg";
	pic[15] = "images/masthead/masthead17.jpg";
	pic[16] = "images/masthead/masthead19.jpg";
	pic[17] = "images/masthead/masthead20.jpg";
	pic[18] = "images/masthead/masthead21.jpg";
	pic[19] = "images/masthead/masthead22.jpg";
	pic[20] = "images/masthead/masthead24.jpg";


	function select(range) {
	if (Math.random)
	return Math.round(Math.random() * (range-1));
	else {
	var now = new Date();
	return (now.getTime() / 1000) % range;
	} }

	var choice = select(set);