这个一定是简单的(我希望)我忽略的东西。我有一组50个问题,从表中提取并放入表格进行回答。我想检查以确保他们都得到了答案(必填)。当用户点击提交时,不会出现任何警告框(甚至是调试框)。我在这里错了什么?
首先,PHP:
echo 'Please complete ALL 50 questions, then press the "SUBMIT" button at the bottom of the page.';
$query = "SELECT *
FROM `starriskquestions`
ORDER BY `QuestionNum` ASC";
$results = $pdo->query($query);
echo '<form name="submitra" action="riskassessmenttest.php" onsubmit="return validateForm()" method="post">';
while ($row = $results->fetch()) {
echo '<br>' .$row["QuestionNum"] . ') ' . $row["Question"] . '<br>
<input type="radio" name="a'.$row["QuestionNum"].'" value="1" /> Yes ----
<input type="radio" name="a'.$row["QuestionNum"].'" value="-1" /> No<br><br>';
}
echo "<br> ARE YOU SURE YOU ANSWERED ALL 50 QUESTIONS??? <br> If so, click the ";
echo "submit buton below <br>";
echo '<input type="hidden" name="testid" value="'.$testid.'">';
echo '<input type="submit" name="submittestanswers" value="submit">';
echo ' </form>';
然后是Javascript
function validateForm()
{
for (var answerloop=1; <=50; answerloop++)
{
var answernum = '"'+ "a" + answerloop + '"';
alert (answerloop);
var x=document.getElementByName(answernum).value;
alert ("This is the variable X: " + x);
if (x!=="1" || x!=="-1")
{
alert(" One or more questions must be filled out");
return false;
}
}
}
答案 0 :(得分:1)
我认为这是错误的:
for (var answerloop=1; <=50; answerloop++)
将其更改为:
for (var answerloop=1; answerloop <=50; answerloop++)
答案 1 :(得分:1)
1,for loop
2,document.getElementByName()
应为document.getElementsByName()
function validateForm(){
for (var answerloop=1; answerloop<=50; answerloop++){
var name = 'a' + answerloop;
var names=document.getElementsByName(name);
var is_checked = false;
for(var i=0;i<names.length;i++){
if(names[i].checked){
is_checked = true;
}
}
if(!is_checked){
alert("One or more questions must be filled out");
return false;
}
}
}
测试:
<form onsubmit="return validateForm()" method="post" action="./">
<?php
for($x=1;$x<=50;$x++){
echo <<<EOD
<input type="radio" name="a{$x}" value="1">
<input type="radio" name="a{$x}" value="-1">
EOD;
}?>
<input type="submit" value="submit">
</form>
答案 2 :(得分:0)
第二个参数
中的for循环缺少answerloop
for (var answerloop=1; <=50; answerloop++)
^
更改为
for (var answerloop=1; answerloop<=50; answerloop++)