var is_weekend =  function(date1){  
    var dt = new Date(date1);  
       
    if(dt.getDay() == 6 || dt.getDay() == 0)  
       {  
        return "weekend";  
        }   
}  
  
console.log(is_weekend('Nov 15, 2014'));  
console.log(is_weekend('Nov 16, 2014'));  
console.log(is_weekend('Nov 17, 2014'));