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分享我想让鼠标点到文本框时提示如何输入离开时提示输入是否错误，可是onblur事件没反应求解
<!DOCTYPE html>
<html>
<head>
<meta charset="gbk">
<title>用户注册</title>
<script type="text/javascript"src="用户注册.js"></script>
</head>
<body>
<form action="" onsubmit="return check();">
<table>
<tr>
<td>用户名:</td>
<td><input type="text" name="userName" onfocus="showHow();"
onblur="showWrong();" /><span id="userMsg"></span></td>
</tr>
<tr>
<td>密码:</td>
<td><input type="password" name="password" onfocus="showHow2();"
onblur="showWrong2();" /><span id="passMsg"></span></td>
</tr>
<tr>
<td></td>
<td>
<input type="submit" value="确定"/>
</td>
</tr>
</table>
</form>
</body>
</html>function showHow() {
var msg = document.getElementById("userMsg");
msg.innerHTML = "首位为字母的4-16位数字、字母、下划线";
}
function showWrong() {
var msg = document.getElementById("userMsg");
var name = document.getElementById("form").userName;
if (name.value == "") {
msg.innerHTML = "用户名不能为空";
return false;
}
if (name.value.length < 4) {
msg.innerHTML = "用户名长度须大于4位";
return false;
}
if (name.value.length > 16) {
msg.innerHTML = "用户名长度须在16位以内";
return false;
}
var reg = /^[a-zA-z]{1}\w{3,15}$/;
var result = reg.test(name.value);
if (result == false) {
msg.innerHTML = "输入用户名格式错误";
return false;
}
return true;
}
function showHow2() {
var msg = document.getElementById("passMsg");
msg.innerHTML = "4-10个字母和下划线";
}
function showWrong2() {
var msg = document.getElementById("passMsg");
var word = document.getElementById("form").password;
var reg = /^[a-zA-Z_]{4,10}$/;
if (word.value == "") {
msg.innerHTML = "密码不能为空";
return false;
}
if (word.value.length < 4) {
msg.innerHTML = "密码长度须大于4位";
return false;
}
if (word.value.length > 10) {
msg.innerHTML = "密码长度须在10位以内";
return false;
}
var result = reg.test(word.value);
if (result == false) {
msg.innerHTML = "输入密码格式错误";
return false;
}
return true;
}
function check() {
return showWrong() && showWrong2();
}
...全文
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