<h1>Hello</h1>
<button id="reload">Reload</button>
<script>
(function(){
var reloadButton = document.getElementById('reload');
if (reloadButton){
 reloadButton.innerHTML += ' ' + Math.random();
 reloadButton.onclick = function(){
 alert('start reload!');
 document.location.reload();
 };
} else {
 alert('nada');
}
})();
</script>