sfHover = function() {
   var meh = document.getElementById("nav");
   if(meh){
     var sfEls = document.getElementById("nav").getElementsByTagName("LI");
     for (var i=0; i<sfEls.length; i++) {
	      sfEls[i].onmouseover=function() {
		      this.className+=" sfhover";
	      }
	      sfEls[i].onmouseout=function() {
		      this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
	      }
	   }
	 }
 }

if (window.attachEvent) window.attachEvent("onload", sfHover);

    var min=12;
    var max=21;

    function increaseFontSize() {
			increaseFontSizeForTag('p');
			increaseFontSizeForTag('ul');
		}
		
		function decreaseFontSize() {
			decreaseFontSizeForTag('p');
			decreaseFontSizeForTag('ul');
		}
		
		function increaseFontSizeForTag(tag_name) {
      var tag = document.getElementsByTagName(tag_name);
      for(i=0;i<tag.length;i++) {
        if(tag[i].style.fontSize) {
          var s = parseInt(tag[i].style.fontSize.replace("px",""));
        } else {
          var s = min;
        }
        if(s!=max) {
          s += 2;
        }
      tag[i].style.fontSize = s+"px"
    }

  }
  function decreaseFontSizeForTag(tag_name) {
    var tag = document.getElementsByTagName(tag_name);
    for(i=0;i<tag.length;i++) {
      if(tag[i].style.fontSize) {
         var s = parseInt(tag[i].style.fontSize.replace("px",""));
      } else {
         var s = min;
      }
      if(s!=min) {
         s -= 2;
      }
      tag[i].style.fontSize = s+"px"
   }   
}