var d = document;
var safari = (navigator.userAgent.toLowerCase().indexOf('safari') != -1) ? true : false;
var gebtn = function(parEl,child) { return parEl.getElementsByTagName(child); };
onload = function() {
    if(!d.getElementById || !d.createTextNode) return;
    var ls = gebtn(d,'label');
    for (var i = 0; i < ls.length; i++) {
        var l = ls[i];
        if (l.className.indexOf('label_') == -1) continue;
        var inp = gebtn(l,'input')[0];
        if (l.className == 'label_check') {
            l.className = (safari && inp.checked == true || inp.checked) ? 'label_check c_on' : 'label_check c_off';
            l.onclick = check_it;
        };
        if (l.className == 'label_radio') {
            l.className = (safari && inp.checked == true || inp.checked) ? 'label_radio r_on' : 'label_radio r_off';
            l.onclick = turn_radio;
        };
    };
};
var check_it = function() {
    var inp = gebtn(this,'input')[0];
    if (this.className == 'label_check c_off' || (!safari && inp.checked)) {
        this.className = 'label_check c_on';
        if (safari) inp.checked = true;
    } else {
        this.className = 'label_check c_off';
        if (safari) inp.checked = false;
    };
};
var turn_radio = function() {
    var inp = gebtn(this,'input')[0];
    if (this.className == 'label_radio r_off' || inp.checked) {
        var ls = gebtn(this.parentNode,'label');
        for (var i = 0; i < ls.length; i++) {
            var l = ls[i];
            if (l.className.indexOf('label_radio') == -1)  continue;
            l.className = 'label_radio r_off';
        };
        this.className = 'label_radio r_on';
        if (safari) inp.checked = true;
    } else {
        this.className = 'label_radio r_off';
        if (safari) inp.checked = false;
    };
};

function clearTextField(id,initialValue) {
    var field = document.getElementById(id);
    if(field.value==initialValue) {
        field.value = '';
    }
 }
 
function openAdvancedSearch() {
    var advancedSearchBlock = document.getElementById('advancedSearchBlock');
    if(advancedSearchBlock) {
        advancedSearchBlock.className = '';
    }
}
function closeAdvancedSearch() {
    var advancedSearchBlock = document.getElementById('advancedSearchBlock');
    if(advancedSearchBlock) {
        advancedSearchBlock.className = 'hidden';
    }
}