var min=50;
var max=130;
function increaseFontSize() {
   var p = document.getElementsByTagName('body');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("%",""));
      } else {
         var s = 90;
      }
      if(s!=max) {
         s += 8;
      }
      p[i].style.fontSize = s+"%"
   }
}
function decreaseFontSize() {
   var p = document.getElementsByTagName('body');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("%",""));
      } else {
         var s = 90;
      }
      if(s!=min) {
         s -= 8;
      }
      p[i].style.fontSize = s+"%"
   }   
}


	function fliphon(x)
		{document[x].filters.fliph.enabled=1;}

	function fliphoff(x)
		{document[x].filters.fliph.enabled=0;}


/* inizio mostra nascondi */

function ShowAndHide(id1,id2){
if(document.getElementById){
    el1=document.getElementById(id1);
    el2=document.getElementById(id2);
    if(el1.style.display=="none"){
        el1.style.display="block";
        el2.style.display="none";
        }
    else{
        el1.style.display="none";
        el2.style.display="block";
        }
    }
}

/* fine mostra nascondi */