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实现用回车代替Tab键的功能

<body> <script language="javascript">         function  keyDown()

        {

                var  keycode=event.keyCode;

                var  keyChar=String.fromCharCode(keycode);

                if(keycode==13)

                event.keyCode=9;

        };

        document.οnkeydοwn=keyDown; </script>

</body>

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