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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 "";
}
 
var now = new Date();
var gun= now.getDate();
//alert(gun);
 
 
if(getCookie('actim')!=gun){
//kodlarınız buraya
alert('kodlari işletiyorum');
}
 
if(getCookie("actim")==''){
//ilk defa açılıyor
setCookie('actim',gun,1);
//alert('cookie ekledim');
}