Hi forum users.
I am trying to write a quiz in JavaScript and I need to have the JS checking the quiz in a separate file than the quiz web page. When I run the following codes, I get the error order is not a function.
Can someone tell me what the error means?
<html>
<head>
<title> Quiz</title>
<script type = "text/javascript" src = "order.js"></script>
</head>
<body>
<form id = "order" action = "" method = "post" >
<label>A collection of a hundred billion stars, gas, and dust is called a</label><br />
<input type="text" name="collection"
size="10" maxlength="25"><br />
<label>The inverse of the Hubble's constant is a measure of the ___ of the universe.</label><br />
<input type="text" name="Hubble"
size="10" maxlength="25"><br />
<label> Stars that live the longest have </label><br />
<input type="checkbox" name="stars" value="small mass" />small mass<br />
<input type="checkbox" name="stars" value="high mass" />high mass <br />
<input type="checkbox" name="stars" value="high temperature" />high temperature<br />
<input type="checkbox" name="stars" value="lots of hydrogen" />lots of hydrogen<br />
<label>The total amount of energy that a star emits is directly related to its</label><br />
<input type="checkbox" name="energy" value="surface gravity and magnetic field" />surface gravity and magnetic field<br />
<input type="checkbox" name="energy" value="radius and temperature" />radius and temperature<br />
<input type="checkbox" name="energy" value="pressure and volume" />pressure and volume<br />
<input type="checkbox" name="energy" value="location and velocity" />location and velocity<br />
<label>According to Kepler the orbit of the earth is a circle with the sun at the center.</label><br />
<input type="radio" name="question3" value="True" />True
<input type="radio" name="question3" value="False" />False<br />
<label>Ancient astronomers did consider the heliocentric model of the solar system </label><br />
but rejected it because they could not detect parallax. </label>
<input type="radio" name="question5" value="True" />True
<input type="radio" name="question5" value="False" />False<br />
<input type = "button" name= "check" value = "calculate" onclick="order();" />
<input type = "reset" value = "Clear Form" /><br />
<br /><br />
</form>
</body>
</html>function order()
{
alert("hello");
var elt = document.getElementById("order");
var score = 0;
var question1= elt.collection.value;
var question2= elt.Hubble.value;
var test= False;
var ans;
if (question1=="galaxy")
{
score= score + 1;
}
if (question2=="age")
{
score= score + 1;
}
for (var index =0; index < elt.question5.length; index++)
{
if (elt.question5[index].checked)
{
ans= elt.question[index].value;
}
}
if (elt.question3[1].checked)
{
score= score+ 1;
}
if (elt.question5[0].checked)
{
score= score + 1;
}
if (elt.energy[1].checked)
{
score= score +1;
}
if (elt.stars[0].checked)
{
score= score + 1;
}
window.alert(score);
}