function checkCookie(dontsetid){
var nowID = GetCookie('idd');
  if ((nowID==null)||(nowID!='setted')) {
   //alert('You can submit');
   if (!(dontsetid>1)) {setID();}
   return true;
  }
  else{
      alert ("Your booking has already been submited!");
      return false;
  }
}

function setID() {
        var expDays = 365; // number of days the cookie should last
        var expDate = new Date();
        expDate.setTime(expDate.getTime() +  (24 * 60 * 60 * 1000 * expDays));
        SetCookie('idd','setted', expDate);
}

function getCookieVal (offset) {
     var endstr = document.cookie.indexOf (";", offset);
     if (endstr == -1)
          endstr = document.cookie.length;
     return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie (name) {
     var arg = name + "=";
     var alen = arg.length;
     var clen = document.cookie.length;
     var i = 0;
     while (i < clen) {
          var j = i + alen;
          if (document.cookie.substring(i, j) == arg)
          return getCookieVal (j);
          i = document.cookie.indexOf(" ", i) + 1;
          if (i == 0) break;
     }
return null;
}

function SetCookie (name, value) {
     var argv = SetCookie.arguments;
     var argc = SetCookie.arguments.length;
     var expires = (argc > 2) ? argv[2] : null;
     var path = (argc > 3) ? argv[3] : null;
     var domain = (argc > 4) ? argv[4] : null;
     var secure = (argc > 5) ? argv[5] : false;
     var test = name + "=" + escape (value) +
     ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
     ((path == null) ? "" : ("; path=" + path)) +
     ((domain == null) ? "" : ("; domain=" + domain)) +
     ((secure == true) ? "; secure" : "");
     document.cookie=test;
}