function backToTop() {
  var x1 = x2 = x3 = 0;
  var y1 = y2 = y3 = 0;
  if (document.documentElement) {
      x1 = document.documentElement.scrollLeft || 0;
      y1 = document.documentElement.scrollTop || 0;
  }
  if (document.body) {
      x2 = document.body.scrollLeft || 0;
      y2 = document.body.scrollTop || 0;
  }
  x3 = window.scrollX || 0;
  y3 = window.scrollY || 0;
  var x = Math.max(x1, Math.max(x2, x3));
  var y = Math.max(y1, Math.max(y2, y3));
  window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));
  if (x > 0 || y > 0) {
      window.setTimeout("backToTop()", 50);
  }
}




Event.observe(window, 'load', setModel);

function setModel()
{
    Event.observe(
        'changeModel',
        'change',
        function()
        {
            new Ajax.Updater(
               's_model',
               '/search/get_model/',
               {
                   method       : 'post',
                   parameters   : Form.serialize('search-form'),
                   onFailure    : function()
                   {
                       $('s_model').innerHTML   = '<select name="model" class="sel-width-lerg">'
                                                + '<option value="0">こだわらない</option>'
                                                + '</select>';
                   }
               }
            );
        }
    );
}

function changeSort(sort, type)
{
    if (type != 0) {
        document.forms[0].action = '/search/type/' + type + '/';
    }
    
    document.forms[0].order.value = sort;
    document.forms[0].submit();
}