function detectJs(SID, HID, PURL){
    if((SID != '') && (HID != '') && (PURL != '')){
        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            http_request = new XMLHttpRequest();
        } else if (window.ActiveXObject) { // IE
            http_request = new ActiveXObject("Microsoft.XMLHTTP");
        }

        http_request.onreadystatechange = function(){
            if (http_request.readyState == 4){
                return true;
            }else if (http_request.readyState == 1){
            }else if (http_request.readyState == 2){

          }
        }
        var post_str = "SID=" + SID + "&HID=" + HID;
        http_request.open('POST', PURL, true);
        var contentType         = "application/x-www-form-urlencoded; charset=UTF-8";
        http_request.setRequestHeader("Content-Type", contentType);
        http_request.send(post_str);
    }
    
}