var min=11;
var max=20;

function loadCookie(){
	if(document.cookie){
		var p = document.getElementsByTagName("*");
		var s = document.cookie.match(/Size=(.*?)(?:;|$)/);		
		if(s!=null){
			for(i = 0; i < p.length;i++){
				p[i].style.fontSize = s[1]+"px";
			}
		}
	}
	setNormal();
}

function setCookie(s){
	document.cookie = "Size="+s;
}
function increaseFontSize() {
   var p = document.getElementsByTagName("*");
   var s;
  
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         s = parseInt(p[i].style.fontSize.replace("px",""));
		
      } else {
         var s = 12;
      }
      if(s!=max) {
         s += 1;
      }
      p[i].style.fontSize = s+"px"
      
   }
   setCookie(s);
   setNormal();  
}
function decreaseFontSize() {
   var p = document.getElementsByTagName("*");
    var s ;
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         s = parseInt(p[i].style.fontSize.replace("px"," "));
          
      } else {
         s = 12;
      }
      if(s!=min) {
         s -= 1;
      }
      p[i].style.fontSize = s+"px";
      
   }      
   setCookie(s);
   setNormal();
}

function setNormal(){
	document.getElementById("si").style.fontSize="12px";
	document.getElementById("siz").style.fontSize="12px";
}