function smallFontSize() {
// make font size small for everything withing paragraph tags 
   var p = document.getElementsByTagName('p');
   for(i=0;i<p.length;i++) {
      p[i].style.fontSize = 12+"px"
   }
// make font size small for everything within paragraph tags
   var p = document.getElementsByTagName('li');
   for(i=0;i<p.length;i++) {
      p[i].style.fontSize = 12+"px"
   }
}
function mediumFontSize() {
// make font size medium for everything within paragraph tags
   var p = document.getElementsByTagName('p');
   for(i=0;i<p.length;i++) {
      p[i].style.fontSize = 15+"px"
   }
// make font size medium for everything within paragraph tags
   var p = document.getElementsByTagName('li');
   for(i=0;i<p.length;i++) {
      p[i].style.fontSize = 15+"px"
   }
}
function largeFontSize() {
// make font size large for everything within paragraph tags
   var p = document.getElementsByTagName('p');
   for(i=0;i<p.length;i++) {
      p[i].style.fontSize = 18+"px"
   }
// make font size large for everything within paragraph tags
   var p = document.getElementsByTagName('li');
   for(i=0;i<p.length;i++) {
      p[i].style.fontSize = 18+"px"
   }
}