<script>
jQuery(document).ready(function() {
  var hints = {
    "email": "Enter your email",
    "first_name": "Enter you name"
  };

  var hideHint = function(field, text){
    if (jQuery(field).val() === text) {
      jQuery(field).val("");
      jQuery(field).removeClass('hint');
    }
  };

  var showHint = function(field, text){
    if (jQuery(field).val() === "") {
      jQuery(field).val(text);
      jQuery(field).addClass('hint');
    }
  };

  var text;

  for (fieldName in hints) {
    text = hints[fieldName];
    jQuery("input[name='"+fieldName+"']").val(text).focus((function(text) {
      return function() {hideHint(this, text);};
    })(text)).blur((function(text) {
      return function() {showHint(this, text);};
    })(text)).addClass('hint');
  }

  var submitButton = jQuery('#'+window.module.lp.form.data.formButtonId);
  var submitAction = submitButton.data('events').click[0];
  var field;

  submitButton.unbind('click', submitAction);
  submitButton.click(function(e) {
    for (fieldName in hints) {
      field = jQuery("input[name='"+fieldName+"']");
      if (field.val() === hints[fieldName]) {
        field.val('');
      }
    }

    submitAction.handler(e);

    for (fieldName in hints) {
      field = jQuery("input[name='"+fieldName+"']");
      if (field.val() === '') {
        field.val(hints[fieldName]);
      }
    }
  });
});
</script>