input 框输入，限制仅仅可输入2位数字

<input class="form-control-erbi col-lg-3" min=1 oninput="javascript:this.value=this.value.replace(/[^\d]$/g,'')" 
type="text" name="weight" id="weight" value="{$result['weight']}" maxlength="2" />

• maxlength = 2 ,仅仅在type=text管用,number类型不管用