// JavaScript Document
function opacity(jshelper_popup_div) {
    element = document.getElementById(jshelper_popup_div);
    opac = document.getElementById("jshelper_darkbg");

    if (element != null) {
        if (element.style.display == 'none' || element.style.display == '') {
            element.style.display = 'block';
            opac.style.display = 'block';
        }
        else {
            element.style.display = 'none';
            opac.style.display = 'none';
        }
    }
}