jsp页面中下拉框选择后,另一个input框数值改变,如何去实现

<head>
	<script type="text/javascript">
	   function aa(){
	    document.getElementById('tt').value=document.getElementById('ss').value;
	    }
	</script>
</head>
<body>
	<select id="ss" onchange="aa()">
		<option value="1">1</option>
		<option value="2">2</option>
		<option value="3">3</option>
		<option value="4">4</option>
		<option value="5">5</option>
		<option value="6">6</option>
	</select>
	<input type="text" id="tt"/>
</body>

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转载自blog.csdn.net/weixin_43240792/article/details/89845883