$(document).ready(function(){


    $("#authorselect").change(function () {
    	
          var str = "";
          $("#authorselect option:selected").each(function () {
                str = "." + $(this).attr("value");
              });
          if (str == ".all") {
          	// alle einblenden
          	$(".blogentries").show("fast");
          	
          } else {
           	$(".blogentries").hide("fast");
            $(str).show("fast");
          }
        })
        .trigger('change');
});