core_js_24.js

function alram(min, callback) {
     var isCall = false;
     setInterval(function() {
          var date = new Date();
          var nowMin = date.getMinutes();

          if(nowMin == min && !isCall) {
               isCall = true;
               callback(nowMin);
          }
     }, 1000);
}

onload=function() {
     alram(15, function(min) {
          alert("현재 Minutes는'" + min + "' 입니다.");
     });
}