function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  var c_start=document.cookie.indexOf(c_name + "=");
  
  if (c_start!=-1)
    { 
    c_start=c_start + c_name.length+1 ;
	//alert(c_start);
    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 cookieExists(cookieName)
{
cookee=getCookie(cookieName);
if (cookee!=null && cookee!="")
  {
  return true
  }
else 
  {
    return false;
  }
}