//Delay of showing the submit buttons in seconds. Set the delay that you want to use in your case.
var timeInterval = 10;
// Timer id
var si;
// Submit value
var submitValue;
// Timer count
var count = timeInterval;

function showDelay() {
  if (document.getElementById('submit') && submitValue) {
    if (count == 0) {
      enableSubmit();
    } else {
        --count;
        document.getElementById('submit').disabled=true;
        document.getElementById('submit').value = submitValue+" (" + count + ")";
    }
  }
}

function disableSubmit() {
    //Delay of showing the submit buttons in seconds. Set the delay that you want to use in your case.
    count = timeInterval;
    if (document.getElementById('submit')) {
	    submitValue = document.getElementById('submit').value;
	    if (typeof count == 'undefined' || parseInt(count) <= 0) {
	        count = timeInterval
	    }
	    showDelay();
	    si = setInterval(function() {showDelay();}, 1000);
    }
}

function enableSubmit() {
  if (document.getElementById('submit') && submitValue) {
	  clearInterval(si);
	  document.getElementById('submit').disabled=false;
	  document.getElementById('submit').value = submitValue;
  }
}