var min=8;
var max=24;
function increaseFontSize() {
   var p = $$('div.txt *');
   for(i=0;i<p.length;i++) {
      if(p[i].getStyle('font-size')) {
         var s = parseInt(p[i].getStyle('font-size').replace("px",""));
      } else {
         var s = 12;
      }
      if(s <= max) {
         s += 1;
      }
      p[i].setStyle('font-size' , s+"px"); 
   }
   //var x = $$('div.description h1');
   //alert(x[0].getStyle('font-size').replace("px","")) 
}
function decreaseFontSize() {
   var p = $$('div.txt *');
   for(i=0;i<p.length;i++) {
      if(p[i].getStyle('font-size')) {
         var s = parseInt(p[i].getStyle('font-size').replace("px",""));
      } else {
         var s = 12;
      }
      if(s >= min) {
         s -= 2;
      }
      p[i].setStyle('font-size' , s+"px");
   }   
}