// mailSent();

function mailSent(id, duration, delay, newContent) {
  var originalContent = document.getElementById(id).innerHTML;
  document.getElementById(id).innerHTML = newContent;
  setTimeout(setOriginalContent, delay);
  function setOriginalContent() {
    if (navigator.appName == "Microsoft Internet Explorer") {
        document.getElementById(id).filters.item("DXImageTransform.Microsoft.Alpha").opacity = 100;
        function loop1() {
          document.getElementById(id).filters.item("DXImageTransform.Microsoft.Alpha").opacity -= 10;
          if (document.getElementById(id).filters.item("DXImageTransform.Microsoft.Alpha").opacity > 0) {
            setTimeout(loop1, duration);
          } else {   
            document.getElementById(id).innerHTML = originalContent;
            function loop2() {
              document.getElementById(id).filters.item("DXImageTransform.Microsoft.Alpha").opacity += 10;
              if (document.getElementById(id).filters.item("DXImageTransform.Microsoft.Alpha").opacity < 100) {
                setTimeout(loop2, duration);
              }
            }
           loop2(); 
          }
        }  
        loop1();
    } else {
      document.getElementById(id).style.opacity = 1;
        function loop1() {
          document.getElementById(id).style.opacity = (Number(document.getElementById(id).style.opacity) - 0.1 );
          if (document.getElementById(id).style.opacity > 0) {
            setTimeout(loop1, duration);
          } else {                                                    
            document.getElementById(id).innerHTML = originalContent; 
            function loop2() {
              document.getElementById(id).style.opacity = (Number(document.getElementById(id).style.opacity) + 0.1 );
              if (document.getElementById(id).style.opacity < 1) {
                setTimeout(loop2, duration);
              }
            }
            loop2();
          }
        }
        loop1();
    }
  }
}