function leap_year_range(st_year, end_year) {  
        var year_range = [];  
        for (var i = st_year; i <= end_year; i++)  
        {  
             year_range.push(i);  
        }  
        var new_array = [];  
  
  year_range.forEach(  
   function(year)  
    {   
       if (test_LeapYear(year))   
       new_array.push(year);  
    });  
  
  return new_array;  
     }  
  
function test_LeapYear(year) {  
   if ((year % 4 === 0 && year % 100 !== 0) || (year % 100 === 0 && year % 400 === 0)) {  
                return year;  
        } else {  
                return false;  
        }  
}  
  
console.log(leap_year_range(2000,2012));