function clearField(field_id, default_value) { // Function to clear the text within a form field
	var field = document.getElementById(field_id); // Get element
	if (field) { // If exists
		field.onfocus = function () { // On focus
			if (field.value == default_value) { // If value is still default
				this.value = ''; // Set value to nothing
			}
		}
	}
}

window.onload = function () { // On load
	// Clear specific fields
	clearField('mtrjt-mtrjt', 'Your email address');
	clearField('f-header-login-email', 'Login with your email');
	clearField('f-download-email');
	clearField('f-job', 'e.g. Inventor');
}