function validateEmail(input, imgID) {
  var img = document.getElementById(imgID);
  var email = input.value;
  var valid = false;
  var pattern = /^[\w\+\.\-=&\|\/\?!\#\$\*]+@[\w\.\-]+\.[\w]+$/;

  if (email=="" || pattern.test(email) || 1 == 0) {
    img.style.display="none";
    input.style.background="white";
  }
  else {
    img.style.display="inline";
    input.style.background="yellow";
  }
}