jQuery onkeyup方法未定义

Jul*_*ian 8 jquery key-events

据说没有定义onkeyup方法,但是我的ide会自动推荐这个方法.当我在chrome dev工具中查看错误时,我得到错误Uncaught TypeError:Object [object Object]没有方法'onkeyup'.我正在使用最新版本的jQuery.这是我的代码:

    <!DOCTYPE html>
<html>
<head>
    <script type="text/javascript" src="jquery-1.7.2.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
            $("button").click(function(){
                var str = document.getElementById('txt1').value;
                $.post("addName.php", {q: str});
            });
            $("input").onkeyup(function(){
                var str = document.getElementById('txt1').value;
                $.post("gethint.php", {q: str});
            });
        });
    </script>
</head>
<body>

<h3>Start typing a name in the input field below:</h3>
<form action="">
    First name: <input type="text" id="txt1"/>
</form>
<p>Suggestions: <span id="txtHint"></span></p>
<button> Add Name</button>

</body>
</html>
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the*_*dox 16

$("input").on('keyup', function(){
    var str = document.getElementById('txt1').value;
    $.post("gethint.php", {q: str});
});
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要么

$("input").keyup( function(){
    var str = document.getElementById('txt1').value;
    $.post("gethint.php", {q: str});
});
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jQuery没有方法名称 onkeyup

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