var min=8;
  var standard=(readCookie('txtsize')==null)?11:readCookie('txtsize');// edited
  var max=17;

  function increaseFontSize() {
     var p = document.getElementsByTagName('p');
     for(i=0;i<p.length;i++) {
        if(p[i].style.fontSize) {
           var s = parseInt(p[i].style.fontSize.replace("px",""));
        } else {
           var s = 11;
        }
        if(s!=max) {
           s += 1;
        }
        p[i].style.fontSize = s+"px";
     }
      createCookie('txtsize',s);// added
  };
  
  function resetFontSize() {
     var p = document.getElementsByTagName('p');
     for(i=0;i<p.length;i++) {
        p[i].style.fontSize = standard+"px";
     }
  };
  
  function decreaseFontSize() {
     var p = document.getElementsByTagName('p');
     for(i=0;i<p.length;i++) {
        if(p[i].style.fontSize) {
           var s = parseInt(p[i].style.fontSize.replace("px",""));
        } else {
           var s = 11;
        }
        if(s!=min) {
           s -= 1;
        }
        p[i].style.fontSize = s+"px";
     }
      createCookie('txtsize',s);// added
  };


/*
added all below
*/

function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}