function setSubmitTrue(element) { window.setTimeout(function() { element.disabled = true; }, 1) }

function setSubmitFalse(element) { window.setTimeout(function() { element.disabled = false; }, 5000) }

function setDisable(elements) {
    for (var i=0; i< elements.length; i++) {
	var element = elements[i];
	if (element.type == 'submit') {
	    setSubmitTrue(element);
	    setSubmitFalse(element);
	}
    }
}

function disableSubmit(elements) {
    for (var i=0; i<document.forms.length; ++i) {
	if (document.forms[i].onsubmit) continue;
	document.forms[i].onsubmit = function() {
	    setDisable(this.elements);
	}
    }
}

window.onload = function() { disableSubmit() };


function backToTop() {
  var x1 = x2 = x3 = 0;
  var y1 = y2 = y3 = 0;
  if (document.documentElement) {
      x1 = document.documentElement.scrollLeft || 0;
      y1 = document.documentElement.scrollTop || 0;
  }
  if (document.body) {
      x2 = document.body.scrollLeft || 0;
      y2 = document.body.scrollTop || 0;
  }
  x3 = window.scrollX || 0;
  y3 = window.scrollY || 0;
  var x = Math.max(x1, Math.max(x2, x3));
  var y = Math.max(y1, Math.max(y2, y3));
  window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));
  if (x > 0 || y > 0) {
      window.setTimeout("backToTop()", 25);
  }
}