var currentSize=16
            function getCookie(c_name){
            if (document.cookie.length>0)
              {
              c_start=document.cookie.indexOf(c_name + "=");
              if (c_start!=-1)
                { 
                c_start=c_start + c_name.length+1; 
                c_end=document.cookie.indexOf(";",c_start);
                if (c_end==-1) c_end=document.cookie.length;
                return unescape(document.cookie.substring(c_start,c_end));
                } 
              }
            return "";
            }
            function setCookie(c_name,value,expiredays){
            var exdate=new Date();
            exdate.setDate(exdate.getDate()+expiredays);
            document.cookie=c_name+ "=" +escape(value)+
            ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
            }            
            function checkCookie(){
            fontSize=getCookie('fontSize');
            if (fontSize!=null && fontSize!="")
              {
                fontSize=parseInt(fontSize);
                currentSize=fontSize;
                document.body.style.fontSize=(currentSize)+'px'
              }
              else 
              {
                currentSize=16;
                document.body.style.fontSize=(currentSize)+'px'
                setCookie('fontSize',currentSize,3);                
              }
            }
            function zoomIn(){
                document.body.style.fontSize=(currentSize+2)+'px'
                currentSize+=2 
                setCookie('fontSize',currentSize,3);      
            }   
            function zoomOut(){
                document.body.style.fontSize=(currentSize-2)+'px'
                currentSize-=2 
                setCookie('fontSize',currentSize,3);      
            }