<{button type="button" label="保存" id="rule_preview" style="display:none;"}>
<{button type="button" label="确认保存" id="rule_save" style="display:;"}>
<{button type="button" label="返回" onclick="history.back();" }>
<{button type="button" label="返回修改" id="rule_edit" style="display:none;"}>