window.onresize = ChangeFont;
var  Rule = new Array;
  Rule[0] = 20;
  Rule[1] = 26;
  Rule[2] = 38;
  Rule[3] = 16;
  Rule[4] = 72;
  Rule[5] = 30;
  Rule[6] = 26;
  Rule[7] = 22;
  Rule[8] = 22;
  Rule[9] = 72;
  Rule[10]= 30;

function ChangeFont() {

  var TheRule= (document.all) ? document.styleSheets[0].rules : document.styleSheets[0].cssRules;

  var width = document.body.clientWidth;
  var height = document.body.clientHeight;
  average =  ( ( (width*.75)/1280 ) + ((height*.8)/1024) ) / 2

  for (i=0;i<Rule.length;i++) TheRule[i].style.fontSize = ( Rule[i] * average );

}