jquery - JavaScript count down, add hours & minutes -

so, have below (seconds countdown) in order. but! trying add hours & minutes apart of count down well. ideally keeping same structure, , using pure js. output be:

there x hours, x minutes, , x seconds remaining on sale!

var count=30;      var counter=setinterval(timer, 1000); //1000  run every 1 second      function timer()     {       count=count-1;       if (count <= 0)       {          clearinterval(counter);          return;       }       document.getelementbyid("timer").innerhtml=count + " secs"; // watch spelling     } 

if solution has rewrite jquery or library; that's fine. not preferable. cheers , salutations help.

something this:

var count = 30; var counter = setinterval(timer, 1000); //1000  run every 1 second  function timer() {     count = count - 1;     if (count == -1) {         clearinterval(counter);         return;     }      var seconds = count % 60;     var minutes = math.floor(count / 60);     var hours = math.floor(minutes / 60);     minutes %= 60;     hours %= 60;      document.getelementbyid("timer").innerhtml = hours + "hours " + minutes + "minutes and" + seconds + " seconds left on sale!"; // watch spelling }