jquery获取所有选中的checkbox

获取所有name为spCodeId的checkbox

     var spCodesTemp = "";
      $("input:checkbox[name=spCodeId]:checked'").each(function(i){
       if(0==i){
        spCodesTemp = $(this).val();
       }else{
        spCodesTemp += (","+$(this).val());
       }
      });
      $("#txt_spCodes").val(spCodesTemp);