function closeForm() {
    echo "<script language="JavaScript">n";
    echo "function closeForm(){ n";
    echo "window.self.close();";
    echo " } n";
    echo "</script>n";
    return true;
}

<input type='button' value='Close' onclick='javascript: window.close();' />

<input id="save_button" type="button" onclick="closeForm();" value="Save"/>

$("#save_button").click(closeForm);