如何使用HTML格式的javascript检查单选按钮验证
我需要验证单选按钮输入，即当按下“提交”按钮且未选择单选按钮时，它会提醒用户说“请选择选项”，如果选择了单选按钮，则只需提交表单并将页面重定向到其他页面，无需提醒。但在我的代码中，每当我按下提交按钮时。即使选择了所有单选按钮，也会显示“请选择选项”。请帮忙如何使用HTML格式的javascript检查单选按钮验证,javascript,html,forms,Javascript,Html,Forms,我需要验证单选按钮输入，即当按下“提交”按钮且未选择单选按钮时，它会提醒用户说“请选择选项”，如果选择了单选按钮，则只需提交表单并将页面重定向到其他页面，无需提醒。但在我的代码中，每当我按下提交按钮时。即使选择了所有单选按钮，也会显示“请选择选项”。请帮忙 <!DOCTYPE html> <html> <head> <style> label{display:inline-block;width:100px;margin-bottom
<!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>
你的主要问题是你没有在无线电元素上循环，下面的选择器找不到任何东西
var radios = document.getElementsByName("yes no");
var form = document.forms.formID;
var radios = form.elements;
然后您可以或多或少地运行您已经拥有的代码。无需查看代码和验证，我同意@mzulch的观点，我正在考虑一种稍微不同的方法。考虑到有40个问题，你可以尝试一种时髦的方法来确保所有问题都被选中 您可以通过编程方式创建一个数组，找到问题的数量，然后创建一个数字数组，该数组包含所有40个数字。请注意，数组的索引为零，这意味着第一个值可能为1，但它的索引为0。然后，当选择单选按钮时，触发一个从数组中删除该数字的函数。当按下submit（提交）按钮时（如果数组中还有任何数字），您可以提醒用户他们错过了一个选项，并且由于数字与问题相关，因此可以明确告诉用户他们需要重新列出哪些选项 这只是一个稍微不同的方法，但可能有用。希望这有帮助，gavgrif用了另一种方式
<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>
试着用这个替换你的函数。您还需要添加以下CSS样式来突出显示missed复选框。我通常使用jquery并返回一个类数组，但这样可以指定问题的数量。这也会向用户指示遗漏了哪个复选框。还假定元素名称的格式为answerxx
<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>
document.getElementsByNameyes no使用name属性的值，但单选按钮有answer1等名称。因此，您可能需要另一种获取所有单选按钮的方法buttons@mzulch哦我的错误，任何提示请代替是，否，有6个单选按钮。从1点到6点。所以我想验证下面的方法，但是如果我勾选它，就不能得到选项1和2。
<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>
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);
});
}