// JavaScript Document

    function show_div()
    {
        document.getElementById('howitworks').style.display = 'block';
        document.getElementById('img_span').innerHTML='<img src="images/button_howitworks.gif" border="0" onclick="close_div()" />';
        //alert(document.getElementById('subscribe').style.display);
    }

    function close_div()
    {
        document.getElementById('howitworks').style.display = 'none';
        document.getElementById('img_span').innerHTML='<img src="images/button_howitworks.gif" border="0" onclick="show_div()" />';
        //alert(document.getElementById('subscribe').style.display);
    }