简单的js onChange（）

来源：互联网发布：sql 外键必须是主键吗编辑：程序博客网时间：2024/06/08 00:41

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><%response.setContentType("text/html;charset=UTF-8");%><script type="text/javascript">function nameChange(userName) {var uName = userName.value;if (uName.length > 8 || uName.length < 3) {document.getElementById("username").innerHTML = "<font style='color:red'>长度要求3~8</font>"} else {document.getElementById("username").innerHTML = "<font style='color:red'>可以使用</font>"}}function passwdChange(passwd) {var passWd = passwd.value;if (passWd.length > 8 || passWd.length < 3) {document.getElementById("password").innerHTML = "<font style='color:red'>长度要求3~8</font>"} else {document.getElementById("password").innerHTML = "<font style='color:red'>可以使用</font>"}}</script><body><form><table align="center"><!-- username  --><tr><td>username:</td><td ><input  type="text" onChange="nameChange(this)"></td><td id="username"></td></tr><!-- password  --><tr><td>password:</td><td ><input type="password" onChange="passwdChange(this)"></td><td id="password"></td></tr></table></form></body></html>

效果：

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