核心提示：htmlheadscriptfunction f_validate() {var username = document.getElementById(uname).value;var passwd ...
<html>
<head>
<script>
function f_validate() {
var username = document.getElementById("uname").value;
var passwd = document.getElementById("passwd").value;
var yzm = document.getElementById("yzm").value;
// var username=document.getElementsByName("uname")[0].value;
// var passwd=document.getElementsByName("passwd")[0].value;
var error = "";
if (username == "" || username == null || username == "请输入") {
// alert("用户名不能为空！");
error = error + "用户名不能为空！";
error = error + "\n";
//return false;
} else if (username.length < 6) {
//alert("您的用户名长度小于6！");
error = error + "您的用户名长度小于6！";
error = error + "\n";
//return false
} else if (username.length > 12) {
//alert("您的用户名长度大于12！");
error = error + "您的用户名长度大于12！";
error = error + "\n";
// return false
}
if (passwd == "" || passwd == null) {
// alert("密码不能为空！");
error = error + "密码不能为空！";
error = error + "\n";
//return false;
} else if (passwd.length < 6) {
// alert("您的密码长度小于6！");
error = error + "您的密码长度小于6！";
error = error + "\n";
//return false
} else if (passwd.length > 12) {
// alert("您的密码长度大于12！");
error = error + "您的密码长度大于12！";
// return false
}
if (yzm == "" || yzm == null) {
// alert("密码不能为空！");
error = error + "验证码不能为空！";
error = error + "\n";
//return false;
}
if (error == "") {
//window.location.href="h.html";
return true;
} else {
alert(error);
return false;
}
}
function setInfo() {
var username = document.getElementById("uname");
if (username.value == "" || username.value == null) username.value = "请输入";
}
function clearInfo() {
var username = document.getElementById("uname").value = "";
}
</script>
</head>
<body onload="setInfo()">
<form action="https://localhost:8080/test/main/whole.html" method="post" onsubmit="return f_validate()">
<center>
<table background="images\bg_img1.jpg" width="945" height="433">
<tbody>
<tr height="25">
<td width="570px"> </td>
<td> </td>
</tr>
<tr>
<td> </td>
<td>
<table cellpadding="5">
<tbody>
<tr>
<td>用户名:</td>
<td colspan="3"><input type="text" name="username" id="uname" value="" onfocus="clearInfo()" onblur="setInfo()" /></td>
</tr>
<tr>
<td>密 码:</td>
<td colspan="3"><input type="password" id="passwd" /> </td>
</tr>
<tr>
<td>验证码:</td>
<td><input type="text" id="yzm" /></td>
<td><img src=".\images\bg_img2.gif" alt="打不开图片" /></td>
<td><a href="#" onclick="shuaxin()">刷新</a> </td>
</tr>
<tr>
<td><input type="checkbox" name="ck" value="1" /></td>
<td colspan="2">自动登录</td>
</tr>
<tr></tr>
</tbody>
</table>
<table cellspacing="30">
<tbody>
<tr>
<td><input type="submit" name="login" value="登录" onclick="f_validate()" /></td>
<td><input type="reset" name="rs" value="重置" /></td>
<td><input type="button" name="zc" value="注册" onclick="location.href='https://localhost:8080/test/lg.html'" /></td>
</tr>
</tbody>
</table></td>
</tr>
</tbody>
</table>
</center>
</form>
</body>
</html>
