当我单击表单提交按钮时，为什么我的表单提交按钮不转到下一页? [英] Why isn't my form submit button not going to a next page when I click on it?
本文介绍了当我单击表单提交按钮时，为什么我的表单提交按钮不转到下一页?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试图弄清楚为什么表单的提交此表单"按钮不能将我带到在< form ... action ="submit form.html" method =中指定的另一个HTML页面get> 属性，不仅如此，而且当我输入错误的名字，电子邮件地址和订单号以及订单日期时，它不会返回我在使用JavaScript的if-else代码中指定的JavaScript消息
I am trying to figure out why the form's "submit this form" button is not taking me to another HTML page I specified in the <form ... action="submit form.html" method="get"> attribute and not only that but when I put wrong first names, email addresses, and order numbers, and date of orders, it doesn't return JavaScript messages I specified in my if-else codes using JavaScript.
这是我在表单上使用的JavaScript代码.
Here is the JavaScript code I use on the form.
var $ = function (id)
{
return document.getElementById(id);
}
var submitForm = function()
{
var FirstName= $("firstName").value;
var OrderNumber= $("orderNumber").value;
var DateOfOrder= $("date_of_order").value;
var emailAddress= $("email_address").value;
var isValid=true;
if(FirstName !== "Cherry", "Micheal", "Sandra", "Cookie")
{
$("firstname_error").firstChild.nodeValue=
"This person does not exist.";
isValid=false;
} else{ $("firstname_error").firstChild.nodeValue="";}
if(OrderNumber !== 3134, 4234, 9234, 3566)
{
$("orderNumber_error").firstChild.nodeValue="Invalid Order Number.";
isValid=false;
} else{ $("orderNumber_error").firstChild.nodeValue="";}
if(DateOfOrder !=='12-07-23', '15-04-24', '16-02-01', '14-01-12')
{
$("date_of_order_error").firstChild.nodeValue="Date doesn't exist in
system";
isValid=false;
} else{ $("date_of_order_error").firstChild.nodeValue="";}
if(emailAddress !="cherryjackson@gmail.com", "michealroberts@yahoo.com",
"sandrabell@hotmail.com", "cookiedanny@outlook.com")
{
$("email_address_error").firstChild.nodeValue="The email doesn't exist";
isValid=false;
} else{ $("email_address_error").firstChild.nodeValue="";}
if(isValid)
{
//submit the form if all entries are valid
$("cookie_form").submit();
}
}
window.onload = function()
{
$("form_submission").onclick = submitForm;
$("email_address").focus();
}body{
background-color:#FBFBE8;
}
/* Tells HTML5 to find the font-type-face that my OS has and then use that for heading 1
and also centers the first heading */
h1{
font-family:Arial, Helvetica, sans-serif;
text-align:center;
}
/* Tells HTML5 to use any of the font-types for my first paragraph in HTML source file
if one is not available. Also clears some white space
from the left margin of the paragraph and finally tells it to give that paragraph
a size of 20 pixels. */
p{
font-family:Arial, Helvetica, sans-serif;
padding: 20px;
font-size:20px;
}
label{
float: left;
width: 11em;
text-align: right;
font-family:Arial, Helvetica, sans-serif;
color:#800000;
}
input{
margin-left: 1em;
margin-bottom:.5em;
}
span{
color: red;
}
.field_set_1{
border-color: purple;
border-style: solid;
}
#form_submission{
background-color:black; color:white;
}
legend{
font-family:Arial, Helvetica, sans-serif;
color:blue;
}
/* All of the classes are just for positioning and floating the four
same images around the form input information */
.Wrap1{
float:right;
margin:40px;
width:200px;
height:200px;
}
.Wrap2{
float:left;
margin:40px;
width:200px;
height:200px;
}
.clearfix {
clear: both;
}<!DOCTYPE html>
<html>
<head>
<title>Cookie Order Form </title>
<link rel="stylesheet" href="First_Design.css">
<script src="cookieform.js"></script>
</head>
<body>
<h1>Cookie Order Form</h1>
<p>This form is a cookie order form for customers that purchased cookies from
Daron's Cookies Company and the following below must be filled out in order for each
customer to receive a final message that tells them when their order will be ready.</p>
<IMG class="Wrap1" SRC="cookie.gif" alt="cookie">
<IMG class="Wrap2" SRC="cookie.gif" alt="cookie2">
<!--The customer will be sent to the HTML page named "submit form.html" after they
click the "Submit this Form" button. The code below does this. -->
<div>
<form id="cookie_form" name="cookie_form" action="submit form.html" method="get">
<fieldset class="field_set_1">
<!-- Below sets the title of the form-->
<legend>Customer Order Form Information:</legend>
<!-- Creates the first left label to specify what should be placed in the text box
the the right of the label. The rest below does the same.-->
<label for="firstName">First Name:</label>
<input type="text" id="firstName" name="firstName">
<span id="firstname_error">*</span><br>
<label for="orderNumber">Order Number:</label>
<input type="text" id="orderNumber" name="orderNumber">
<span id="orderNumber_error">*</span><br>
<label for="date_of_order">Date of Order:</label>
<input type="text" id="date_of_order" name="date_of_order">
<span id="date_of_order_error">*</span><br>
<label for="email_address">Email Address:</label>
<input type="text" id="email_address" name="email_address">
<span id="email_address_error">*</span><br>
<label> </label>
<input type="button" id="form_submission" value="Submit this Form">
</fieldset>
</form>
</div>
<div class="clearfix">
</div>
<IMG class="Wrap1" SRC="cookie.gif" alt="cookie">
<IMG class="Wrap2" SRC="cookie.gif" alt="cookie2">
</body>
</html>推荐答案
您的代码有很多问题，但最大的是您的验证测试，每个测试都遵循以下相同的结构:
There were a great many things wrong with your code, but the biggest was your validation tests, that each followed the same structure of:
if(FirstName !== "Cherry", "Micheal", "Sandra", "Cookie")
您不能针对逗号分隔的值列表测试 firstName .每一个都必须单独进行测试，并且您必须在它们之间使用复合逻辑运算符:
You can't test firstName against a comma-separated list of values. Each one must be tested individually and you must use a compound logical operator between them:
if(FirstName !== "Cherry" && FirstName !== "Micheal" &&
FirstName !== "Sandra" && FirstName !== "Cookie")
您还使用了一个标准按钮，而不是一个提交按钮，在某些情况下，当您按下ENTER键时，这可能会导致您的所有验证都被绕过.始终使用提交按钮并在 submit 事件中进行验证.
You were also using a standard button, rather than a submit button, which can cause all your validation to be bypassed in some situations when the ENTER key is hit. Always use a submit button and validate in the submit event.
请参阅我经过重组和重新组织的代码解决方案以获取内联注释.
Please see my restructured and re-organized code solution for inline comments.
Stack Overflow代码段环境(如下)不适用于表单(因为它是沙盒)，但是可以在 此处 中运行相同的代码
The Stack Overflow snippet environment (below) doesn't work with forms (because it's sandboxed), but the same code can be run here.
// W3C DOM Event model instead of node event properties:
window.addEventListener("DOMContentLoaded", function() {
// Since we're now using the submit event, we hook into that event:
// Use camelCase for JavaScript identifiers
var form = getElem("cookieForm");
form.addEventListener("submit", validate);
getElem("emailAddress").focus();
// Opening curly braces should appear on the same line as the declaration they open
// Dollar signs are legal identifiers, but usually denote libraries (like JQuery) and
// can be confusing if you are not using those libraries.
function getElem (id) {
return document.getElementById(id);
}
function validate(evt) {
var inputs = document.querySelectorAll(".validate");
// It's better logic to assume false, which avoids "false positives"
var isValid = false;
// Loop through the fields that need validation
for (var i = 0; i < inputs.length; ++i){
var message = ""; // This is the potential error message
// Validate the input according to its id:
switch (inputs[i].id) {
case "firstName" :
// You can't check a single value against a comma-separated list, you have to check
// it against each value you are interested in:
isValid = (inputs[i].value !== "Cherry" && inputs[i].value !== "Micheal" &&
inputs[i].value !== "Sandra" && inputs[i].value !== "Cookie") ? false : true;
message = (!isValid) ? "This person does not exist." : "";
break;
case "orderNumber" :
// Remember, HTML form fields always return strings, not numbers
isValid = (inputs[i].value !== "3134" && inputs[i].value !== "4234" &&
inputs[i].value !== "9234" && inputs[i].value !== "3566") ? false : true;
message = (!isValid) ? "Invalid Order Number." : "";
break;
case "dateOfOrder" :
isValid = (inputs[i].value !=='12-07-23' && inputs[i].value !== '15-04-24' &&
inputs[i].value !== '16-02-01' && inputs[i].value !== '14-01-12') ? false : true;
message = (!isValid) ? "Date doesn't exist in system" : "";
break;
case "emailAddress" :
isValid = (inputs[i].value != "cherryjackson@gmail.com" &&
inputs[i].value !== "michealroberts@yahoo.com" &&
inputs[i].value !== "sandrabell@hotmail.com" &&
inputs[i].value !== "cookiedanny@outlook.com") ? false : true;
message = (!isValid) ? "The email doesn't exist" : "";
break;
}
// Update the UI with the correct message:
inputs[i].nextElementSibling.textContent = message;
}
if(!isValid) {
// cancel the submission if we're invalid
evt.preventDefault(); // Cancel the form's submission
evt.stopPropagation(); // Don't bubble the event
}
}
});body{
background-color:#FBFBE8;
}
/* Tells HTML5 to find the font-type-face that my OS has and then use that for heading 1
and also centers the first heading */
h1{
font-family:Arial, Helvetica, sans-serif;
text-align:center;
}
/* Tells HTML5 to use any of the font-types for my first paragraph in HTML source file
if one is not available. Also clears some white space
from the left margin of the paragraph and finally tells it to give that paragraph
a size of 20 pixels. */
p {
font-family:Arial, Helvetica, sans-serif;
padding: 20px;
font-size:20px;
}
label{
float: left;
width: 11em;
text-align: right;
font-family:Arial, Helvetica, sans-serif;
color:#800000;
}
input{
margin-left: 1em;
margin-bottom:.5em;
}
span {
color: red;
}
.field_set_1{
border-color: purple;
border-style: solid;
}
#form_submission{ background-color:black; color:white; }
legend{
font-family:Arial, Helvetica, sans-serif;
color:blue;
}
/* All of the classes are just for positioning and floating the four
same images around the form input information */
.Wrap1{
float:right;
margin:40px;
width:200px;
height:200px;
}
.Wrap2{
float:left;
margin:40px;
width:200px;
height:200px;
}
.clearfix {
clear: both;
}<form id="cookieForm" name="cookieForm" action="submit form.html" method="get">
<fieldset class="field_set_1">
<!-- Below sets the title of the form-->
<legend>Customer Order Form Information:</legend>
<!-- Creates the first left label to specify what should be placed in the text box
the the right of the label. The rest below does the same.-->
<label for="firstName">First Name:</label>
<input type="text" id="firstName" name="firstName" class="validate">
<span id="firstname_error">*</span><br>
<label for="orderNumber">Order Number:</label>
<input type="text" id="orderNumber" name="orderNumber" class="validate">
<span id="orderNumber_error">*</span><br>
<label for="dateOfOrder">Date of Order:</label>
<input type="text" id="dateOfOrder" name="dateOfOrder" class="validate">
<span id="dateOfOrder_error">*</span><br>
<label for="emailAddress">Email Address:</label>
<input type="text" id="emailAddress" name="emailAddress" class="validate">
<span id="emailAddress_error">*</span><br>
<label> </label>
<!-- Always use a "submit" button to initiate form submission, even
if there will be form validation -->
<input type="submit" id="form_submission" value="Submit this Form">
</fieldset>
</form>这篇关于当我单击表单提交按钮时，为什么我的表单提交按钮不转到下一页?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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