<script type="text/javascript">
function checkform(){ var name=document.getElementById("userName").value;
var pwd=document.getElementById("userPwd").value;
if(name.length<=0){
document.getElementById("NameError").style.display="block";
return false;
}
if(pwd.length<=0){
document.getElementById("PwdError").style.display="none";
return false;
}
}</script>
<form name="login" method="post" action="index.jsp" onsubmit="return checkform()">
<span style="font-size:12px;color:#666;">账户:</span>
<input type="text" id="userName" name="userName" value="" /><br>
<span id="NameError" style="display:none">用户名不能为空</span>
<br>
<span style="font-size:12px;color:#666;">密码:</span>
<input type="password" id="userPwd" name="userPwd" value=""/><br>
<span id="PwdError" style="display:none">密码不能为空</span>
<a href="javascript:document.login.submit()"> <div class="loginbt"> </div></a>
<a href="register.html"><div class="q_reg"></div></a>
</form>
请问为什么这样写,验证没有效果,不能验证用户名和密码?????
function checkform(){ var name=document.getElementById("userName").value;
var pwd=document.getElementById("userPwd").value;
if(name.length<=0){
document.getElementById("NameError").style.display="block";
return false;
}
if(pwd.length<=0){
document.getElementById("PwdError").style.display="none";
return false;
}
}</script>
<form name="login" method="post" action="index.jsp" onsubmit="return checkform()">
<span style="font-size:12px;color:#666;">账户:</span>
<input type="text" id="userName" name="userName" value="" /><br>
<span id="NameError" style="display:none">用户名不能为空</span>
<br>
<span style="font-size:12px;color:#666;">密码:</span>
<input type="password" id="userPwd" name="userPwd" value=""/><br>
<span id="PwdError" style="display:none">密码不能为空</span>
<a href="javascript:document.login.submit()"> <div class="loginbt"> </div></a>
<a href="register.html"><div class="q_reg"></div></a>
</form>
请问为什么这样写,验证没有效果,不能验证用户名和密码?????
<script type="text/javascript">
function checkform(){var name=document.getElementById("userName").value;
var pwd=document.getElementById("userPwd").value;
if(name.length<=0){
document.getElementById("NameError").style.display="block";
return;
}
if(pwd.length<=0){
document.getElementById("PwdError").style.display="block";
return;
}document.login.submit()
}</script>
<form name="login" method="post" action="index.jsp">
<span style="font-size:12px;color:#666;">账户:</span>
<input type="text" id="userName" name="userName" value="" /><br>
<span id="NameError" style="display:none">用户名不能为空</span>
<br>
<span style="font-size:12px;color:#666;">密码:</span>
<input type="password" id="userPwd" name="userPwd" value=""/><br>
<span id="PwdError" style="display:none">密码不能为空</span>
<a href="javascript:checkform()"> <div class="loginbt"> </div></a>
<a href="register.html"><div class="q_reg"></div></a>
</form>
<script type="text/javascript">
function checkform(){var name=document.getElementById("userName").value;
var pwd=document.getElementById("userPwd").value;
if(name.length<=0){
document.getElementById("NameError").style.display="block";
return false;
}
if(pwd.length<=0){
document.getElementById("PwdError").style.display="none";
return false;
}
return true;//加上这个
}</script>
<form name="login" method="post" action="index.jsp" onsubmit="return checkform()">
<span style="font-size:12px;color:#666;">账户:</span>
<input type="text" id="userName" name="userName" value="" /><br>
<span id="NameError" style="display:none">用户名不能为空</span>
<br>
<span style="font-size:12px;color:#666;">密码:</span>
<input type="password" id="userPwd" name="userPwd" value=""/><br>
<span id="PwdError" style="display:none">密码不能为空</span>
<a href="javascript:document.login.submit()"> <div class="loginbt"> </div></a>
<a href="register.html"><div class="q_reg"></div></a>
</form>
其他的都对
var pwd=document.getElementById("userPwd").value;
if(name.length<=0){
document.getElementById("NameError").style.display="block";
return false;
}
if(pwd.length<=0){
document.getElementById("PwdError").style.display="none";
return false;
} return true;
}