Welches Skript ist das?

Code:
    }

    return true;

}

function switch_type_new(id, type, selectedIndex) {

    boxes = document.getElementsByName('new[' + id + '][pri]');

    if(boxes[0]) {

        //lang lebe der IE

        if ((navigator.appName == 'Microsoft Internet Explorer') && selectedIndex == 1) {

            type = 'MX';

        }

        if(type == 'MX') {

            boxes[0].type = "text";

        }

        else {

            boxes[0].type = "hidden";

        }

    }

    return true;

}

function switch_my_ip(formdata) {

    boxes = document.getElementsByName('new[2][destination]');

    if(boxes[0]) {

        boxes[0].value="mail."+formdata;

    }

    return true;

}

function unhide(id) {

    obj = document.getElementById(id);

    if(obj.style.display == "none")

        obj.style.display = "";

    else

        obj.style.display = "none";

}