/* NOTE: requre: jquery.js */ 

function showPopupBox(popupWrap_id, popupBg_id, topVal){

    var browser=navigator.appName;
    var b_version=navigator.appVersion;
    var version=b_version.split(";");
    var trim_Version=version[1].replace(/[ ]/g,""); 
    if(browser=="Microsoft Internet Explorer" && trim_Version=="MSIE6.0"){
            topVal = topVal || 40;
            $(window).scroll(function(){
                document.getElementById(popupWrap_id).style.top = 
                    document.documentElement.scrollTop + topVal + "px";
            });
    }

        var bg = document.getElementById(popupBg_id);
        var wrap = document.getElementById(popupWrap_id);
        if(bg.style.display == "none"){
            bg.style.display = "block";
            wrap.style.display = "block";
            bg.style.height = document.body.scrollHeight + "px";
        }
        else{
            bg.style.display = "none";
            wrap.style.display = "none";;
        }
}