时间: 2021-07-31 作者:daque
以次四个文本框,每个限输出四个字符,输出完后机动跳到下一文本框:输出字符: - - - 在<head>...</head>之间介入如次代码:<script id="clienteventhandlersjs" language="javascript"><!--function t1_onkeyup() { if(document.card.t1.value.length==4){ document.card.t2.focus(); }} function t2_onkeyup() { if(document.card.t2.value.length==4){ document.card.t3.focus(); }}function t3_onkeyup() { if(document.card.t3.value.length==4){ document.card.t4.focus(); }}//--></script>在<body>...</body>之间介入如次代码:<form method="post" name="card" action>输出字符:<input type="text" name="t1" size="4" maxlength="4" language="javascript" onkeyup="return t1_onkeyup()">-<input type="text" name="t2" size="4" maxlength="4" language="javascript" onkeyup="return t2_onkeyup()">-<input type="text" name="t3" size="4" maxlength="4" language="javascript" onkeyup="return t3_onkeyup()">-<input type="text" name="t4" size="4" maxlength="4"></form>