window.onload=function()  { 
  var element = document.getElementById("myBar");    
  var width = 1; 
  var identity = setInterval(scene, 10); 
  function scene() { 
    if (width >= 100) { 
      clearInterval(identity); 
    } else { 
      width++;  
      element.style.width = width + '%';  
    } 
  } 
}