percentages; using "large", "x-large" makes them too big for
some troublemakers. ;-)
(Not specifying them at all causes some browsers to make them the same
size as normal text. ;-( )
h1, h2, h3, h4, h5, h6 { font-family: avantgarde, sans-serif;
font-weight: bold }
-h1, h2 { font-size: x-large }
-h3, h4 { font-size: large }
+h1 { font-size: 180% }
+h2 { font-size: 150% }
+h3, h4 { font-size: 120% }
code, tt { font-family: courier }
var { font: italic normal serif }