$(document).ready(function(){
    $("#sapi_select").change(function () {
          var str = "";
          $("#sapi_select option:selected").each(function () {
                str += $(this).text() + " ";
              });
			  kep = "images/probafulke/"+$(this).attr("value")+".jpg";
          $("#sapi_kep").attr({ 
				src: kep
			});
        })
        .change();

    $("#agathion_select").change(function () {
          var str = "";
          $("#agathion_select option:selected").each(function () {
                str += $(this).text() + " ";
              });
			  kep = "images/probafulke/"+$(this).attr("value")+".jpg";
          $("#sapi_kep").attr({ 
				src: kep
			});
        })
        .change();


  });