function show_user_login() {
    $('user_unknown').fade();
    $('user_login').appear();
}
function hide_user_login() {
    $('user_unknown').appear();
    $('user_login').fade();
}
function hide_user_message() {
    $('login_messagebox').fade();
}


function editHiddenInput(hiddenInput) {
    switch(hiddenInput) {
        case "gender_male":
            document.getElementsByName("gender_male")[0].value   = 1;
            document.getElementsByName("gender_female")[0].value = "";
            break;
        case "gender_female":
            document.getElementsByName("gender_male")[0].value   = "";
            document.getElementsByName("gender_female")[0].value = 1;
            break;
        case "testabo":
            document.getElementsByName("testabo")[0].value = 1;
            document.getElementsByName("abo")[0].value     = "";
            break;
        case "abo":
            document.getElementsByName("testabo")[0].value = "";
            document.getElementsByName("abo")[0].value     = 1;
            break;
    }
    
}


Event.observe(window, 'load', function() {
    $('meta2_searchfield_input').onfocus = function() {
        this.className += ' focused';
        if(this.value == "Suchbegriff eingeben") {
            this.value = "";
        }
    }
    $('meta2_searchfield_input').onblur = function() {
        this.className = this.className.replace('focused', '');
        if(this.value == "") {
            this.value = "Suchbegriff eingeben";
        }
    }
});


// gives IE6 the ability to hover other tags than A
sfHover = function() {
    if( document.getElementById("navi") ) {
        var sfEls = document.getElementById("navi").getElementsByTagName("LI");
    } else {
        var sfEls = document.getElementById("navi_sub").getElementsByTagName("LI");
    }
    
    for (var i=0; i<sfEls.length; i++) {
        sfEls[i].onmouseover=function() {
            this.className+=" sfhover";
        }
        sfEls[i].onmouseout=function() {
            this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
        }
    }
}
if (window.attachEvent) window.attachEvent("onload", sfHover);


function checkChekbox() {
    if(!document.getElementById("tx-srfeuserregister-pi1-newsletter_versand").checked &&
       !document.getElementById("tx-srfeuserregister-pi1-kommentar_pdf").checked) {
        alert("Bitte entscheiden Sie sich, ob Sie den DZW Newsletter abonnieren und/oder Artikel kommentieren und PDF-Versionen der Artikel downloaden möchten.");
        return false;
    } else {
        return true;
    }
}