function popup(url, target) {
    w = screen.width*(3/4);
    h = screen.height*(3/4);
    l = (screen.width-w)/2;
    t = (screen.height-h)/2;
    widthHeight = "width="+w+",height="+h+",left="+l+",top="+t+",menubar=no,resizable=yes,scrollbars=no,status=no,toolbar=no,location=no";
    window.open(url,target,widthHeight);
    return true
}

function openchat(oForm) {
    if (oForm.nick.value.length == 0) {
        alert ('You have to fill in a nickname');
    } else {
        s = oForm.style.value + '?nick=' + oForm.nick.value;
        popup(s,'chatroom');
    }
    return false;
}

function setjs() {
    if(navigator.product == "Gecko") {
        document.loginform["interface"].value = "mozilla";
    } else if(window.opera && document.childNodes) {
        document.loginform["interface"].value = "opera7";
    } else if(navigator.appName == "Microsoft Internet Explorer" && navigator.userAgent.indexOf("Mac_PowerPC") > 0) {
        document.loginform["interface"].value = "konqueror";
    } else if(navigator.appName == "Microsoft Internet Explorer" && document.getElementById && document.getElementById("ietest").innerHTML) {
        document.loginform["interface"].value = "ie";
    } else if(navigator.appName == "Konqueror") {
        document.loginform["interface"].value = "konqueror";
    } else if(window.opera) {
        document.loginform["interface"].value = "opera";
    }
}
 
function setcharset() {
    if(document.charset && document.loginform["Character set"]) {
        var opt = document.createElement("option")
        opt.value = document.charset
        document.loginform["Character set"].appendChild(opt)
    }
}