jQuery.fn.resizehandle = function() {
  return this.each(function() {
    var me = jQuery(this);
    me.after(
      jQuery('<div class="resizehandle"></div>')
      .bind('mousedown', function(e) {
        var h = me.height();
        var y = e.clientY;
        var moveHandler = function(e) {
          me
          .height(Math.max(20, e.clientY + h - y));
        };
        var upHandler = function(e) {
          jQuery('html')
          .unbind('mousemove',moveHandler)
          .unbind('mouseup',upHandler);
        };
        jQuery('html')
        .bind('mousemove', moveHandler)
        .bind('mouseup', upHandler);
      })
    );
  });
}