function inputPlaceholder (input, color) {
  if (!input) return null;
  if (input.placeholder && 'placeholder' in document.createElement('input')) return input;
  var placeholder_color = color || '#AAA';
  var default_color = input.style.color;
  var placeholder = input.getAttribute('placeholder');
  if (input.value === '' || input.value == placeholder) {
    input.value = placeholder;
    input.style.color = placeholder_color;
  }
  var add_event = /*@cc_on'attachEvent'||@*/'addEventListener';
  input[add_event](/*@cc_on'on'+@*/'focus', function(){
    input.style.color = default_color;
    if (input.value == placeholder) {
      input.value = '';
    }
  }, false);
  input[add_event](/*@cc_on'on'+@*/'blur', function(){
    if (input.value === '') {
      input.value = placeholder;
      input.style.color = placeholder_color;
    } else {
      input.style.color = default_color;
    }
  }, false);
  input.form && input.form[add_event](/*@cc_on'on'+@*/'submit', function(){
    if (input.value == placeholder) {
      input.value = '';
    }
  }, false);
  return input;
};