[英]Javascript for loop seems to exit or get stuck after the first iteration
I have a contact us form that i want to check with javascript before submitting it to php. 我有联系我们的表格,我想在将其提交给php之前使用javascript进行检查。 so when i call the function verify(), by placing alert("hello")'s throughout the code, i determined that it was exiting after the first iteration of the second loop.
因此,当我通过在整个代码中放置alert(“ hello”)来调用函数verify()时,我确定它在第二个循环的第一次迭代之后退出。 does anyone know why?
有人知道为什么吗?
Heres my html form code: 这是我的html表单代码:
<div id="errortext">
</div>
<form id="contact" method="post" action="contact.php">
<h2>Contact Us</h2>
<h1>Fields marked with a * are required</h1>
<p>Full Name*</p>
<input type="text" class="single" placeholder="Full Name" name="name" id="name" /><br />
<p>E-Mail Address*</p>
<input type="text" class="single" placeholder="E-Mail Address" name="email" id="email" /><br />
<p>Phone Number</p>
<input type="text" class="single" placeholder="Phone Number" name="number" id="number" /><br />
<p>Subject</p>
<input type="text" class="single" placeholder="Subject" name="subject" id="subject" /><br />
<p>Message*</p>
<textarea placeholder="Message" name"message" id="message"></textarea><br />
<input type="button" id="submitb" onclick="verify()" value="SEND" />
</form>
and heres my javascript code: 这是我的JavaScript代码:
<script type="text/javascript">
function verify()
{
var rgood = true, nrgood = true;
var name = document.getElementById("name");
var email = document.getElementById("email");
var phone = document.getElementById("number");
var subject = document.getElementById("subject");
var message = document.getElementById("message");
var error = document.getElementById("errortext");
var relements = new Array(name, email, message);
var nrelements = new Array(phone, subject);
var relementsng = new Array;
var nrelementsng = new Array;
var relementsngp = new Array;
var nrelementsng = new Array;
for (var x = 0; x < relements.length; x++)
{
if (relements[x].value == "")
{
rgood = false;
relementsng.push(relements[x]);
relementsngp.push(relements[x].placeholder);
}
}
for (var y = 0; y < nrelements.length; y++)
{
if (nrelements[y].value == "")
{
nrgood = false;
nrelementsng.push(nrelements[y]);
nrelementsngp.push(nrelements[y].placeholder);
}
}
alert("hello");
if (!rgood)
{
error.textContent = "All required fields are not filled out! These fields must be filled out: " + nrelementsngp.toString() + "!";
}
}
</script>
Your code is all right except this typo : 除此错字外,您的代码还可以:
line23: nrelementsngp.push(nrelements[x].placeholder);
^
line31: nrelementsngp.push(nrelements[y].placeholder);
^
"ReferenceError: Can't find variable: nrelementsngp"
Hope this helps. 希望这可以帮助。
var relementsng = new Array;
var nrelementsng = new Array;
var relementsngp = new Array;
var nrelementsng = new Array; // <<---- Change this line to
To 至
var nrelementsngp = new Array;
Because 因为
for (var y = 0; y < nrelements.length; y++){
if (nrelements[y].value == ""){
nrgood = false;
nrelementsng.push(nrelements[y]);
nrelementsngp.push(nrelements[y].placeholder); // This place is causing your script to crash
}
}
The identifier nrelementsngp
isn't declared. 未声明标识符
nrelementsngp
。
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