<html>
<script src="jquery-1.3.2.min.js"></script>
<body>
<button onclick="test()">测试 </button>
<input id="test" value="123456">
</body>
</html>
<script type="text/javascript">
function test(){
var range = input.createTextRange();
range.select();
}
</script>
input本来就没有定义啊,你要想获取input元素,用document.getElementById(“#test”)来获取