火狐浏览器里面错误信息不提示。Ie谷歌都好用

 //验证所选的日期是否在停留时间范围内
    function validateServiceDate(id){
        var serviceDate = $("#serviceBeginDate"+id).val();
        $.ajax({
            url:'${ctx}/reserve/validateServiceDate',
            type:'post',
            async:false,
            data:'serviceDate='+serviceDate,
            success:function(result){
                if(result=='false'){
                    alert("<fmt:message key='tourismProductSelect.dialogBox.product.dateRange.error'/>");
                    $("#serviceBeginDate"+id).focus();
                    $("#serviceBeginDate"+id).attr("style","color:red;");
                    if($("#packType").val()=='0'){
                        $("#noproductId"+id).attr('checked',false);
                    }else{
                        $("#productId"+id).attr('checked',false);
                    }
                    return false;
                }else{//正常可选
                    $("#serviceBeginDate"+id).attr("style","");
                }
            }

        });
    }

按照firebug看下是不是脚本出错了。