JS Sleep

sleep.js

      function sleep(milliseconds) {                                                
        var start = new Date().getTime();                                           
        for (var i = 0; i < 1e7; i++) {                                             
          if ((new Date().getTime() - start) > milliseconds){                       
            break;                                                                  
          }                                                                         
        }                                                                           
      }                                                                             
                    
      sleep(3000);