var min=6; 
      var standard="12"// edited 
      var max=18; 

      function increaseFontSize() { 
		 var p = jQuery('#content *');
         for(i=0;i<p.length;i++) { 
            if(p[i].style.fontSize) { 
               var s = parseInt(p[i].style.fontSize.replace("px","")); 
            } else { 
               var s = 12; 
            } 
            if(s!=max) { 
               s += 1; 
            } 
            p[i].style.fontSize = s+"px"; 
         } 
          createCookie('txtsize',s);// added 
      }; 
       
      function resetFontSize() { 
		 var p = jQuery('#content *');
         for(i=0;i<p.length;i++) { 
            p[i].style.fontSize = standard+"px"; 
         } 
      }; 
       
      function decreaseFontSize() { 
		 var p = jQuery('#content *');
         for(i=0;i<p.length;i++) { 
            if(p[i].style.fontSize) { 
               var s = parseInt(p[i].style.fontSize.replace("px","")); 
            } else { 
               var s = 12; 
            } 
            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; 
//} 

window.onload = function(){
  // your stuff

}