Javascript 为什么在onChange事件发生时不调用clear()函数?
我正在完成一个关于Javascript表单验证的练习。 在我的代码中,我有一个包含三列的表:表单名称、表单、验证消息。 当表单验证期间发生错误时,消息将显示在第三列中。当表单元素被更改时,错误消息应该消失,但不会消失。似乎根本没有调用clear()函数。有人能帮帮我吗?谢谢Javascript 为什么在onChange事件发生时不调用clear()函数?,javascript,validation,Javascript,Validation,我正在完成一个关于Javascript表单验证的练习。 在我的代码中,我有一个包含三列的表:表单名称、表单、验证消息。 当表单验证期间发生错误时,消息将显示在第三列中。当表单元素被更改时,错误消息应该消失,但不会消失。似乎根本没有调用clear()函数。有人能帮帮我吗?谢谢 <html> <head> <title>Validation</title> <script type="text/javascript"> functi
<html>
<head>
<title>Validation</title>
<script type="text/javascript">
function clear()
{
for(var i in document.getElementsByName("error"))
{
document.getElementsByName("error")[i].innerHTML = "";
}
}
function validate()
{
if(document.Form.Name.value.length < 1)
{
document.getElementsByName("error")[0].innerHTML = "Please enter your full name."
return false;
}
if(document.Form.Address.value.length<3)
{
document.getElementsByName("error")[1].innerHTML = "Please enter full address."
return false;
}
if(document.Form.Phone.value.length <6)
{
document.getElementsByName("error")[2].innerHTML = "Please enter a phone number."
return false;
}
if(document.Form.Email.value.length <5 || "@".search(document.Form.Email.value)==-1)
{
document.getElementsByName("error")[3].innerHTML = "Please enter a valid e-mail address";
return false;
}
}
</script>
</head>
<body>
<h1>Validation</h1>
<p>Enter the following information. When you press the Submit button, the data you entered will be validated.</p>
<form name="Form" onSubmit="return validate()">
<table>
<tr>
<td>Name</td>
<td><input type="text" name="Name" size="20" onchange="clear()" class="Form"></td>
<td><div name="error"></div></td>
</tr>
<tr>
<td>Address</td>
<td><textarea rows="5" columns="20" class="Form" onchange="clear()" name="Address"></textarea></td>
<td><div name="error"></div></td>
</tr>
<tr>
<td>Phone</td>
<td><input type="text" name="Phone" onchange="clear()" size="11" class="Form"></td>
<td><div name="error"></div></td>
</tr>
<tr>
<td>E-mail</td>
<td><input type="text" name="Email" onchange="clear()" size="20" class="Form"></td>
<td><div name="error"></div></td>
</tr>
</table>
<input type="submit" value="Submit" >
<input type="button" value="Clear" onClick="clear();">
</form>
</body>
</html>
验证
函数clear()
{
for(document.getElementsByName(“错误”)中的变量i)
{
document.getElementsByName(“错误”)[i].innerHTML=“”;
}
}
函数验证()
{
if(document.Form.Name.value.length<1)
{
document.getElementsByName(“错误”)[0]。innerHTML=“请输入您的全名。”
返回false;
}
如果(document.Form.Address.value.length),请尝试以下操作
<html>
<head>
<title>Validation</title>
</head>
<body>
<h1>Validation</h1>
<p>Enter the following information. When you press the Submit button, the data you entered will be validated.</p>
<form name="Form" onSubmit="return validate()">
<table>
<tr>
<td>Name</td>
<td><input type="text" name="Name" size="20" onkeypress="return clearErrors();" class="Form"></td>
<td><div name="error"></div></td>
</tr>
<tr>
<td>Address</td>
<td><textarea rows="5" columns="20" class="Form" onkeypress="return clearErrors();" name="Address"></textarea></td>
<td><div name="error"></div></td>
</tr>
<tr>
<td>Phone</td>
<td><input type="text" name="Phone" onkeypress="return clearErrors();" size="11" class="Form"></td>
<td><div name="error"></div></td>
</tr>
<tr>
<td>E-mail</td>
<td><input type="text" name="Email" onkeypress="return clearErrors();" size="20" class="Form"></td>
<td><div name="error"></div></td>
</tr>
</table>
<input type="submit" value="Submit" >
<input type="button" value="Clear" onClick="return clearErrors();">
</form>
<script type="text/javascript">
function clearErrors()
{
var arr = new Array();
arr = document.getElementsByName('error');
for (var i = 0; i < arr.length; i++) {
document.getElementsByName('error')[i].innerHTML = "";
}
return true;
}
function validate()
{
if(document.Form.Name.value.length < 1)
{
document.getElementsByName("error")[0].innerHTML = "Please enter your full name."
return false;
}
if(document.Form.Address.value.length<3)
{
document.getElementsByName("error")[1].innerHTML = "Please enter full address."
return false;
}
if(document.Form.Phone.value.length <6)
{
document.getElementsByName("error")[2].innerHTML = "Please enter a phone number."
return false;
}
if(document.Form.Email.value.length <5 || "@".search(document.Form.Email.value)==-1)
{
document.getElementsByName("error")[3].innerHTML = "Please enter a valid e-mail address";
return false;
}
}
</script>
</body>
</html>
验证
验证
输入以下信息。当您按下提交按钮时,您输入的数据将被验证
名称
地址
电话
电子邮件
函数clearErrors()
{
var arr=新数组();
arr=document.getElementsByName('error');
对于(var i=0;i 如果(document.Form.Address.value.length)尝试将clear方法重命名为其他方法(例如“clearErrors”)。似乎与内置函数存在名称冲突。