var min=8;
var max=18;

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 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 setFontSize(size)
{
if(size>0)
{
var p=document.getElementById("page").getElementsByTagName("*");

   for(i=0;i<p.length;i++) {

      p[i].style.fontSize = size+"px";

   }
}
}

function increaseFontSize() {

//   var px = document.getElementById("page");

//   var p=px.childNodes[0].getElementsByTagName("*");

var p=document.getElementById("page").getElementsByTagName("*");

   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";


   }

setCookie('font_size',s,0);
}
function decreaseFontSize() {

var p=document.getElementById("page").getElementsByTagName("*");
   
   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"


   }   

setCookie('font_size',s,0);

}