function hidden_filter(span, obj_id) {  var obj = $(obj_id);  if(obj.style.display == 'none') {    span.className = 'collapse_open';    obj.style.display = '';  } else {    span.className = 'collapse_close';    obj.style.display = 'none';  }}function submit_price(cur_url) {    var price_left = price_right = null;    price_left = Number($('price_left').value);    price_right = Number($('price_right').value);    if(!price_left && !price_right) {        alert(lang.undifine_price_range);        return;    }    if(price_left) {        cur_url = cur_url + '&min_price=' + price_left;    }    if(price_right) {        cur_url = cur_url + '&max_price=' + price_right;    }    self.location.href = cur_url;}