function set_secondpair_switch_reqest_withanswer(url) {
    var slash_idex = parseInt(document.getElementById('secondpair_switch_img').src.lastIndexOf('/'))+1;
    var current_image = document.getElementById('secondpair_switch_img').src.substr(slash_idex);
    if (current_image == 'option.gif') {
        document.getElementById('secondpair_switch_img').src='/.file/option_o.gif';
    } else if (current_image == 'option_o.gif') {     
        document.getElementById('secondpair_switch_img').src='/.file/option.gif';
    }
    url = replaceAll(url, "'", "`");     
    http_request = false;
    if (window.XMLHttpRequest) { // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        //http_request.overrideMimeType('text/xml');
    } else if (window.ActiveXObject) { // IE
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
        }
    }
    if (!http_request) {
        alert('Customer Request Error: Write Custimer Data');
        alertInhalt = '0';
        return false;
    } else {      
        //alert(url);
        alertInhalt = '1';
    }
    http_request.open('POST', url, true);
    //http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    http_request.onreadystatechange = sendRequest_secondpair_switch_response;
    http_request.send(null);
}

function sendRequest_secondpair_switch_response() {
    if (http_request.readyState==4 && http_request.status==200) {
        var response = http_request.responseText;
        if (response == 'enabled') {
            document.getElementById('secondpair_switch_img').src='/.file/option_o.gif';
        } else if (response == 'disabled') {
            document.getElementById('secondpair_switch_img').src='/.file/option.gif';
        }
    }
}