Edit in JSFiddle

<form>
<input type="text" txt="姓名" /><br />	
<input type="number" value="" required /><br />	
<input type="button" id="hidBtn" value="hide" />
<input type="submit" id="btn" value="ok" />	
</form>
	

$("#hidBtn").click(function(){	
   $("input[type=number]").hide();
});