function datepicker(inputs) {
  Sabel.Array.each(inputs, function(input) {
    var div = document.createElement("div");
    div.style.position = "absolute";
    div.style.zIndex = 100;
    document.body.appendChild(div);
    
    var self = {
      element: Sabel.get(input),
      calendar: new Sabel.Widget.Calendar(div, {
        callback: function(date) {
          self.element.value = date.join("-");
        }
      }),
      render: function() {
        self.calendar.render();
      }
    };
    
    div.style.top  = Sabel.Element.getCumulativeTop(self.element)  + "px";
    div.style.left = Sabel.Element.getCumulativeLeft(self.element) + "px";
    
    self.calendar.WeekDays = ["日", "月", "火", "水", "木", "金", "土"];
    self.element.observe("mousedown", self.render);
  });
}