var plus = "<img src=\""+ssw+"modules/irodahazhu_mediacenter_sidebar/images/plus.jpg\" alt=\"plus\" title=\"plus\"";
var minus = "<img src=\""+ssw+"modules/irodahazhu_mediacenter_sidebar/images/minus.jpg\" alt=\"minus\" title=\"minus\"";

function openker(ker){
    document.getElementById('plusminus_'+ker).innerHTML = minus+" onclick=\"changeker("+ker+")\" > ";
    document.getElementById('ker_data_'+ker).style.display='block';
    ajaxstr = ssw+'modules/irodahazhu_mediacenter_sidebar/irodahazhu_mediacenter_sidebar_resp.php?open='+ker;
    ajax(ajaxstr,'');
}

function closeker(ker){
    document.getElementById('plusminus_'+ker).innerHTML = plus+" onclick=\"changeker("+ker+")\" > ";
    document.getElementById('ker_data_'+ker).style.display='none';
    ajaxstr = ssw+'modules/irodahazhu_mediacenter_sidebar/irodahazhu_mediacenter_sidebar_resp.php?close='+ker;
    ajax(ajaxstr,'');
}
function changeker(ker){
    if(document.getElementById('ker_data_'+ker).style.display == 'none')openker(ker);
    else closeker(ker);    
}