var min=0;
var max=16;
var size=20;
var m="";
function increaseFontSize(s) {
   var e=document.getElementsByName(s);
   for(i=0;i<e.length;i++) {
      if(e[i].style.fontSize) {
         var s = parseInt(e[i].style.fontSize.replace("pt",""));
      } else {
         var s = 12;
      }
      if(s!=max) {
         s += 1;
      }
      e[i].style.fontSize = s+"pt";
	  e[i].style.display = '';
   }
}

function decreaseFontSize(s) {
   var e=document.getElementsByName(s);
   var l=0
   for(i=0; i<e.length; i++) {
      if(e[i].style.fontSize) {
         var s = parseInt(e[i].style.fontSize.replace("pt",""));
      } else {
         var s = max;
      }
      if(s!=min) {
         s -= 1;
      } else {
	     e[i].style.display = 'none'; 
	  }
	  e[i].style.fontSize = s+"pt";
	}   
}

function display_menu(s) {
	var c;
	size=size-1;
	if (s!='') 	{
		m=s;
		size=max;
	}
	if (m=="livery") {
		increaseFontSize("livery");
	} else {
		decreaseFontSize("livery");
	}
	if (m=="pool") {
		increaseFontSize("pool");
	} else {
		decreaseFontSize("pool");
	}
	if (m=="stud") {
		increaseFontSize("stud");
	} else {
		decreaseFontSize("stud");
	}
	if (m=="training") {
		increaseFontSize("training");
	} else {
		decreaseFontSize("training");
	}
	if (m=="rehab") {
		increaseFontSize("rehab");
	} else {
		decreaseFontSize("rehab");
	}
	if (m=="info") {
		increaseFontSize("info");
	} else {
		decreaseFontSize("info");
	}
	//c = "display_menu('"+s+"')";
	c = "display_menu('')";
	if (size>0)
	{
		t=setTimeout(c,20); 
	}
}

display_menu('');