如何使用HTML形式的JavaScript檢查單選按鈕驗證
[英]How to check the Radio button validation using javascript in HTML form
問題描述
我需要驗證單選按鈕的輸入，即當按下提交按鈕且未選擇任何單選按鈕時，它會警告用戶說“請選擇選項”，如果選擇了單選按鈕，則只需提交表單和頁面重定向轉到其他頁面，無需提醒。 但是在我的代碼中，每當我按下提交按鈕時。 即使選中了所有單選按鈕，它也會顯示“請選擇選項”。 請幫忙。
<!DOCTYPE html>
<html>
<head>
<style>
label{display:inline-block;width:100px;margin-bottom:10px;}
</style>
<title>PVQ Questionary</title>
<!-- =========================================================== -->
<script LANGUAGE="JavaScript">
function validateForm() {
var radios = document.getElementsByName("yes no");
var formValid = false;
var i = 0;
while (!formValid && i < radios.length) {
if (radios[i].checked) formValid = true;
i++;
}
if (!formValid) alert("Must check some option!");
return formValid;
}
</script>
<!-- =========================================================== -->
</head>
<body>
<form name="form1" action="process.php" onsubmit="return validateForm()" method="post">
<!-- <form method="post" action="process.php"> -->
<label>First Name</label>
<input type="text" name="first_name" />
<br />
<label>Last Name</label>
<input type="text" name="last_name" />
<br />
<label>Department</label>
<input type="text" name="department" />
<br />
<label>Email</label>
<input type="text" name="email" />
<br />
<label>Location</label>
<input type="text" name="location" />
<br />
<label>Sex</label>
<input type="radio" name="sex" value="male" >Male
<br/>
<div align="center">
<FONT size="" color="blue">
<h1>Portrait Values Questionnaire (PVQ) for Male </h1>
<h2> Here we briefly describe some people. Please read each description and think about how much each person is or is not like you. Put an "Yes" or "No" in the given options that shows how much the person in the description is like you.</h2>
</div>
</FONT>
<h3>1. Thinking up new ideas and being creative is important to him. He likes to do things in his own original way.</h3>
<input type="radio" name="answer1" value="yes" >Yes
<input type="radio" name="answer1" value="no">No
<br/>
<h3>2. It is important to him to be rich. He wants to have a lot of money and expensive things.</h3>
<input type="radio" name="answer2" value="yes" >Yes
<input type="radio" name="answer2" value="no">No
<br/>
<h3>3. He thinks it is important that every person in the world be treated equally. He believes everyone should have equal opportunities in life.</h3>
<input type="radio" name="answer3" value="yes" >Yes
<input type="radio" name="answer3" value="no">No
<br/>
<h3>4. It's very important to him to show his abilities. He wants people to admire what he does.</h3>
<input type="radio" name="answer4" value="yes" >Yes
<input type="radio" name="answer4" value="no">No
<br/>
<h3>5.It is important to him to live in secure surroundings. He avoids anything that might endanger his safety.</h3>
<input type="radio" name="answer5" value="yes" >Yes
<input type="radio" name="answer5" value="no">No
<br/>
<h3>6.He thinks it is important to do lots of different things in life. He always looks for new things to try.</h3>
<input type="radio" name="answer6" value="yes" >Yes
<input type="radio" name="answer6" value="no">No
<br/>
<h3>7.He believes that people should do what they're told. He thinks people should follow rules at all times, even when no-one is watching.</h3>
<input type="radio" name="answer7" value="yes" >Yes
<input type="radio" name="answer7" value="no">No
<br/>
<h3>8.It is important to him to listen to people who are different from him. Even when he disagrees with them, he still wants to understand them.</h3>
<input type="radio" name="answer8" value="yes" >Yes
<input type="radio" name="answer8" value="no">No
<br/>
<h3>9.He thinks it's important not to ask for more than what you have. He believes that people should be satisfied with what they have.</h3>
<input type="radio" name="answer9" value="yes" >Yes
<input type="radio" name="answer9" value="no">No
<br/>
<h3>10.He seeks every chance he can to have fun. It is important to him to do things that give him pleasure.</h3>
<input type="radio" name="answer10" value="yes" >Yes
<input type="radio" name="answer10" value="no">No
<br/>
<h3>11.It is important to him to make his own decisions about what he does. He likes to be free to plan and to choose his activities for himself.</h3>
<input type="radio" name="answer11" value="yes" >Yes
<input type="radio" name="answer11" value="no">No
<br/>
<h3>12.It's very important to him to help the people around him. He wants to care for their well-being.</h3>
<input type="radio" name="answer12" value="yes" >Yes
<input type="radio" name="answer12" value="no">No
<br/>
<h3>13.Being very successful is important to him. He likes to impress other people.</h3>
<input type="radio" name="answer13" value="yes" >Yes
<input type="radio" name="answer13" value="no">No
<br/>
<h3>14.It is very important to him that his country be safe. He thinks the state must be on watch against threats from within and without.</h3>
<input type="radio" name="answer14" value="yes" >Yes
<input type="radio" name="answer14" value="no">No
<br/>
<h3>15.He likes to take risks. He is always looking for adventures.</h3>
<input type="radio" name="answer15" value="yes" >Yes
<input type="radio" name="answer15" value="no">No
<br/>
<h3>16.It is important to him always to behave properly. He wants to avoid doing anything people would say is wrong.</h3>
<input type="radio" name="answer16" value="yes" >Yes
<input type="radio" name="answer16" value="no">No
<br/>
<h3>17.It is important to him to be in charge and tell others what to do. He wants people to do what he says.</h3>
<input type="radio" name="answer17" value="yes" >Yes
<input type="radio" name="answer17" value="no">No
<br/>
<h3>18.It is important to him to be loyal to his friends. He wants to devote himself to people close to him.</h3>
<input type="radio" name="answer18" value="yes" >Yes
<input type="radio" name="answer18" value="no">No
<br/>
<h3>19.He strongly believes that people should care for nature. Looking after the environment is important to him.</h3>
<input type="radio" name="answer19" value="yes" >Yes
<input type="radio" name="answer19" value="no">No
<br/>
<h3>20.Religious belief is important to him. He tries hard to do what his religion requires.</h3>
<input type="radio" name="answer20" value="yes" >Yes
<input type="radio" name="answer20" value="no">No
<br/>
<h3>21.It is important to him that things be organized and clean. He really does not like things to be a mess.</h3>
<input type="radio" name="answer21" value="yes" >Yes
<input type="radio" name="answer21" value="no">No
<br/>
<h3>22. He thinks it's important to be interested in things. He likes to be curious and to try to understand all sorts of things.</h3>
<input type="radio" name="answer22" value="yes" >Yes
<input type="radio" name="answer22" value="no">No
<br/>
<h3>23. He believes all the worlds’ people should live in harmony. Promoting peace among all groups in the world is important to him.</h3>
<input type="radio" name="answer23" value="yes" >Yes
<input type="radio" name="answer23" value="no">No
<br/>
<h3>24.He thinks it is important to be ambitious. He wants to show how capable he is.</h3>
<input type="radio" name="answer24" value="yes" >Yes
<input type="radio" name="answer24" value="no">No
<br/>
<h3>25.He thinks it is best to do things in traditional ways. It is important to him to keep up the customs he has learned.</h3>
<input type="radio" name="answer25" value="yes" >Yes
<input type="radio" name="answer25" value="no">No
<br/>
<h3>26.Enjoying life's pleasures is important to him. He likes to 'spoil' himself.</h3>
<input type="radio" name="answer26" value="yes" >Yes
<input type="radio" name="answer26" value="no">No
<br/>
<h3>27.It is important to him to respond to the needs of others. He tries to support those he knows.</h3>
<input type="radio" name="answer27" value="yes" >Yes
<input type="radio" name="answer27" value="no">No
<br/>
<h3>28.He believes he should always show respect to his parents and to older people. It is important to him to be obedient.</h3>
<input type="radio" name="answer28" value="yes" >Yes
<input type="radio" name="answer28" value="no">No
<br/>
<h3>29.He wants everyone to be treated justly, even people he doesn't know. It is important to him to protect the weak in society.</h3>
<input type="radio" name="answer29" value="yes" >Yes
<input type="radio" name="answer29" value="no">No
<br/>
<h3>30.He likes surprises. It is important to him to have an exciting life.</h3>
<input type="radio" name="answer30" value="yes" >Yes
<input type="radio" name="answer30" value="no">No
<br/>
<h3>31.He tries hard to avoid getting sick. Staying healthy is very important to him.</h3>
<input type="radio" name="answer31" value="yes" >Yes
<input type="radio" name="answer31" value="no">No
<br/>
<h3>32.Getting ahead in life is important to him. He strives to do better than others.</h3>
<input type="radio" name="answer32" value="yes" >Yes
<input type="radio" name="answer32" value="no">No
<br/>
<h3>33.Forgiving people who have hurt him is important to him. He tries to see what is good in them and not to hold a grudge.</h3>
<input type="radio" name="answer33" value="yes" >Yes
<input type="radio" name="answer33" value="no">No
<br/>
<h3>34.It is important to him to be independent. He likes to rely on himself.</h3>
<input type="radio" name="answer34" value="yes" >Yes
<input type="radio" name="answer34" value="no">No
<br/>
<h3>35.Having a stable government is important to him. He is concerned that the social order be protected.</h3>
<input type="radio" name="answer35" value="yes" >Yes
<input type="radio" name="answer35" value="no">No
<br/>
<h3>36.It is important to him to be polite to other people all the time. He tries never to disturb or irritate others.</h3>
<input type="radio" name="answer36" value="yes" >Yes
<input type="radio" name="answer36" value="no">No
<br/>
<h3>37.He really wants to enjoy life. Having a good time is very important to him.</h3>
<input type="radio" name="answer37" value="yes" >Yes
<input type="radio" name="answer37" value="no">No
<br/>
<h3>38. It is important to him to be humble and modest. He tries not to draw attention to himself.</h3>
<input type="radio" name="answer38" value="yes" >Yes
<input type="radio" name="answer38" value="no">No
<br/>
<h3>39. He always wants to be the one who makes the decisions. He likes to be the leader.</h3>
<input type="radio" name="answer39" value="yes" >Yes
<input type="radio" name="answer39" value="no">No
<br/>
<h3>40. It is important to him to adapt to nature and to fit into it. He believes that people should not change nature.</h3>
<input type="radio" name="answer40" value="yes" >Yes
<input type="radio" name="answer40" value="no">No
<br/>
<input type="submit" value="SUBMIT">
</form>
</body>
</html>
6 個解決方案
解決方案1
1 2016-02-16 05:53:58
The thing is you have done the checking weather the radio is selected or not only once and which is to be done for all the available radio buttons.
for (i = 0; i < radios.length; i++) {
var radios = document.getElementsByName("yes no");
var formValid = false;
}
解決方案2
0 2016-02-16 03:26:55
您的主要問題是您沒有遍歷單選元素，下面的選擇器找不到任何東西。
var radios = document.getElementsByName("yes no");
您將希望它是無線電元素的數組：
var form = document.forms.formID;
var radios = form.elements;
那么您可以或多或少地運行您已經擁有的代碼。
解決方案3
0 2016-02-16 03:34:08
沒有考慮代碼和驗證（我同意@mzulch），我在考慮一種略有不同的方法。 鑒於存在40個問題，您可以嘗試采用一種時髦的方法來確保已選擇所有問題。
您可以創建一個數組（以編程方式找到問題的數量，然后創建數字數組），從而得到一個包含所有40個數字的數組（請注意，該數組的索引為零-意味着第一個值可以為“ 1”，但它將被索引）為“ 0”）。 然后，當選擇單選按鈕時，觸發一個從陣列中刪除該數字的功能。 當按下“提交”按鈕時（如果數組中還剩下所有數字），然后您可以提醒用戶他們錯過了一個選項，並且由於這些數字與問題有關，因此可以特別告知用戶哪個選項/ s他們需要反叛。
只是略有不同的方法，但可能有用。 希望這會有所幫助，gavgrif
解決方案4
0 2016-02-16 05:33:50
換了另一種方式
<script type="text/javascript">
function validateForm(daForm) {
// check all rb radio buttons
for (var i = 1; i <= 40; i++) {
if (! getCheckedRadioValue(daForm["answer"+i])) {
alert ("Please select a value for Question " + i)
return false
}
}
// add other checks here...
return true
}
function getCheckedRadioValue(radio) {
for (var i=0; i < radio.length; i++) {
if (radio[i].checked) return radio[i].value
}
return false
}
</script>
解決方案5
0 已采納 2016-02-16 06:32:40
嘗試以此替換您的功能。 您還需要添加以下CSS樣式，以突出顯示錯過的復選框。 我通常使用jquery並返回一個類數組，但是這樣您可以指定問題數量。 這也為您的用戶提供了有關錯過哪個復選框的指示。 還假設您的元素名稱采用“ answerxx”格式
<style>
.error {
border: 2px solid red;
padding:4px;
}
</style>
<script>
function validateForm() {
var questions = 40 //Set the total number of questions
var goodForm = true; //default is form is fine
for(var i=1; i <= questions; i++)
{
//get array of checkboxes for each question by name
radio = document.getElementsByName("answer" + i)
//check whether there is at least one radio selected
if(!(radio[0].checked||radio[1].checked))
{
//if not, add the .error class/style
radio[0].previousElementSibling.classList.add("error");
goodForm = false;
}
else
{
//remove the class if it is ok, need this if user submits again
radio[0].previousElementSibling.classList.remove("error");
}
}
//alert user on error, and return form validation status
if(!goodForm) alert("Please check the options highlighted in red")
return goodForm;
}
</script>
解決方案6
-3 2018-05-03 16:13:43
function asd(e) {
var r = document.getElementsByName("container");
for (var i = 0; i < r.length; i++) {
if (r[i].checked) {
alert(r[i].value);
return;
}
}
alert("ther ware som problem \n 1.you moust choose acup or cone");
e.preventDefault()
}
window.onload = function() {
document.getElementById("IceCreamForm").addEventListener("submit", function(e) {
asd(e);
});
}
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