var messages = new Array();
messages[0] = new Array('./tips/is.gif','Password required.');
messages[1] = new Array('./tips/is.gif','Curriculum Vitae');
messages[2] = new Array('./tips/is.gif','The internal angle between surface <strong>p</strong> and surface <strong>q</strong>');
messages[3] = new Array('./tips/is.gif','Surface <strong>p</strong> defined by vertices <strong>ABV</strong>');
messages[4] = new Array('./tips/is.gif','Surface <strong>q</strong> defined by vertices <strong>ACV</strong>');
messages[5] = new Array('./tips/is.gif','Vector for the line pointing directly away from surface <strong>p</strong>');
messages[6] = new Array('./tips/is.gif','Vector for the line pointing directly away from surface <strong>q</strong>');
messages[7] = new Array('./tips/is.gif','<strong>Cross product</strong> determines the vector at right-angles to two other vectors');
messages[8] = new Array('./tips/is.gif','Copyright Materials - do not reproduce without permission.');