var dateNow, dateDay, dateMonth;

var fPath = 'lightbox/js/';
var fName = 'snow.js';
var filesname = fPath + fName;
var loadMe = false;

dateNow = new Date();
dateMonth = dateNow.getMonth()+1;
dateDay = dateNow.getDate();

function loadScript(filesname)
{
   document.write('<script language="JavaScript" type="text/javascript" src="' + filesname + '"></script>');
}

if(dateMonth == 12 || dateMonth == 1)
{
   if(dateMonth == 12 && dateDay < 32)
   {
       loadMe = true;
   }

   if(dateMonth == 1)
   {
       if(dateDay > 0 && dateDay < 15)
       {
           loadMe = true;
       }
   }
}

if(loadMe)
{
   loadScript(filesname);
}