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Values in fields can not be recognized

why can not my function register a text that is clicked, but must I enter it manually to calculate in total?
Namely, my idea is that by clicking on a product, it is displayed in the input field [284] of the product price, and when clicking on a checkbox option to increase the price and display it at the end of [388], the text menu can now only it is compiled if I enter a number manually in field 285. How can I do it?
function displayAbo(el) {
document.getElementById("contactFormFieldId_284").value = el.querySelector('.product__title').textContent+ " " +el.querySelector('.product__price').textContent;
}
var checkBoxes = document.getElementsByClassName('contactFormClass_checkbox');
var sum = 0,
inputField = document.getElementById('contactFormFieldId_284'),
finalInput = document.getElementById('contactFormFieldId_388');
Array.prototype.slice.call(checkBoxes).forEach( (checkBox) => {
checkBox.addEventListener('change', calculateTotal, false);
})
inputField.addEventListener('blur', calculateSumWithInput, false);
function calculateTotal(e) {
if(e.target.checked) {
sum += parseInt(e.target.value, 10);
} else {
sum -= parseInt(e.target.value, 10);
}
finalInput.value ="CHF "+ sum + ".–";
}
function calculateSumWithInput(e) {
var re = /\d+/;
var value = re.exec(e.target.value);
if(value && !isNaN(value) && Number(value) === parseInt(value, 10)) {
sum = parseInt(value, 10);
finalInput.value = sum;
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="product__item" onclick="displayAbo(this)" id="product-medium" tabindex="-1" role="radio" aria-checked="false" aria-describedby="medium-desc">
<div class="product__inner" id="medium-desc">
<h3 class="product__title">LEUWIN M</h3>
<ul class="product__features">
<li class="product__features-item">40 Mbit/s</li>
<li class="product__features-item"><img src="themes/zuerich/images/I.png" style="width: 100px; margin-right: 110px;"></li>
</ul>
<h4 class="product__price">CHF 39.–</h4>
</div>
</div>
<div class="contact row">
<label for="contactFormFieldId_284" style="color: #003664; font-size: 16px; font-weight: bold;">[[284_LABEL]]</label>
<input class="contactFormClass_text" id="contactFormFieldId_284" type="text" name="contactFormField_284" value="[[284_VALUE]]" readonly />
</div>
<div class="contact row">
<label for="contactFormFieldId_385">[[385_LABEL]]</label>
<input class="contactFormClass_checkbox" id="contactFormFieldId_385" type="checkbox" name="contactFormField_385" value="5" [[SELECTED_385]] />
</div>
<div class="contact row">
<label for="contactFormFieldId_386">[[386_LABEL]]</label>
<input class="contactFormClass_checkbox" id="contactFormFieldId_386" type="checkbox" name="contactFormField_386" value="15" [[SELECTED_386]] />
</div>
<div class="contact row">
<label for="contactFormFieldId_387">[[387_LABEL]]</label>
<input class="contactFormClass_checkbox" id="contactFormFieldId_387" type="checkbox" name="contactFormField_387" value="20" [[SELECTED_387]] />
</div>
<div class="contact row">
<label for="contactFormFieldId_388" style="color: #003664; font-size: 16px; font-weight: bold;">[[388_LABEL]]</label>
<input class="contactFormClass_text" id="contactFormFieldId_388" type="text" name="contactFormField_388" value="0" />
</div>

I have made 2 changes.
Changed your blur function to click
inputField.addEventListener('click', calculateSumWithInput, false);
Added click triggers in your functions
inputField.click();
function displayAbo(el) {
document.getElementById("contactFormFieldId_284").value = el.querySelector('.product__title').textContent + " " + el.querySelector('.product__price').textContent;
inputField.click();
}
var checkBoxes = document.getElementsByClassName('contactFormClass_checkbox');
var sum = 0,
inputField = document.getElementById('contactFormFieldId_284'),
finalInput = document.getElementById('contactFormFieldId_388');
Array.prototype.slice.call(checkBoxes).forEach((checkBox) => {
checkBox.addEventListener('change', calculateTotal, false);
})
inputField.addEventListener('click', calculateSumWithInput, false);
inputField.click();
function calculateTotal(e) {
if (e.target.checked) {
sum += parseInt(e.target.value, 10);
} else {
sum -= parseInt(e.target.value, 10);
}
finalInput.value = "CHF " + sum + ".–";
}
function calculateSumWithInput(e) {
var re = /\d+/;
var value = re.exec(e.target.value);
if (value && !isNaN(value) && Number(value) === parseInt(value, 10)) {
sum = parseInt(value, 10);
finalInput.value = "CHF " + sum + ".–";
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="product__item" onclick="displayAbo(this)" id="product-medium" tabindex="-1" role="radio" aria-checked="false" aria-describedby="medium-desc">
<div class="product__inner" id="medium-desc">
<h3 class="product__title">LEUWIN M</h3>
<ul class="product__features">
<li class="product__features-item">40 Mbit/s</li>
<li class="product__features-item"><img src="themes/zuerich/images/I.png" style="width: 100px; margin-right: 110px;"></li>
</ul>
<h4 class="product__price">CHF 39.–</h4>
</div>
</div>
<div class="contact row">
<label for="contactFormFieldId_284" style="color: #003664; font-size: 16px; font-weight: bold;">[[284_LABEL]]</label>
<input class="contactFormClass_text" id="contactFormFieldId_284" type="text" name="contactFormField_284" value="[[284_VALUE]]" readonly />
</div>
<div class="contact row">
<label for="contactFormFieldId_385">[[385_LABEL]]</label>
<input class="contactFormClass_checkbox" id="contactFormFieldId_385" type="checkbox" name="contactFormField_385" value="5" [[SELECTED_385]] />
</div>
<div class="contact row">
<label for="contactFormFieldId_386">[[386_LABEL]]</label>
<input class="contactFormClass_checkbox" id="contactFormFieldId_386" type="checkbox" name="contactFormField_386" value="15" [[SELECTED_386]] />
</div>
<div class="contact row">
<label for="contactFormFieldId_387">[[387_LABEL]]</label>
<input class="contactFormClass_checkbox" id="contactFormFieldId_387" type="checkbox" name="contactFormField_387" value="20" [[SELECTED_387]] />
</div>
<div class="contact row">
<label for="contactFormFieldId_388" style="color: #003664; font-size: 16px; font-weight: bold;">[[388_LABEL]]</label>
<input class="contactFormClass_text" id="contactFormFieldId_388" type="text" name="contactFormField_388" value="0" />
</div>

How to make explanations in quiz disappear when clicked on another answer?

I have been struggling for a while with this since I'm not a pro.
The issue: A quiz. After you click answer A and then submit, you will get an
explanation next to answer A. When you then click answer B and then submit you
will get an explanation next to answer B but explanation A about answer A remains.
This has to disappear.
Here is the link: https://plnkr.co/edit/OvcwBzfFte4A0F0NbNSi?p=preview
<style>
.quizbox {
width: 58%;
max-width: 950px;
border: 1px gray solid;
margin: auto;
padding: 10px;
border-radius: 10px;
border-width: 5px;
border-color: #00A7AE;
margin-top: 7%;
text-align: center;
position: relative;
background: #73B7DB;
}
.row {
text-align: left;
color: white;
margin-left: 10%;
}
span#demo, #demo2, #demo3 {
display: inline;
color: green;
margin-right: 30%;
float:right;
width:50%;
}
</style>
<div class="quizbox">
<!-- open main div -->
<h1>Quiz</h1>
<form id="form1" action=" ">
<div class="row"> <h3>Moths are a member of what order?</h3></div>
<div class="row">
<input name="variable" type="radio" value="0" />Octagon <span id="demo"></span></div>
<div> </div>
<div class="row">
<input name="variable" type="radio" value="0" />Leprosy <span id="demo2"></span></div>
<div class="row">
<input name="variable" type="radio" value="33" />Lepidoptera <span id="demo3"></span></div>
<p> <input type="submit" onclick="myFunction()" value="Submit" /> </p>
</form>Your grade is: <span id="grade">__</span>
<p id="grade2"></p>
</div>
<!-- close quizbox div -->
<span>fdf</span> <span>fdf</span><span>fdf</span>
fd
<script>
document.getElementById("form1").onsubmit = function(e) {
e.preventDefault();
variable = parseInt(document.querySelector('input[name = "variable"]:checked').value);
sub = parseInt(document.querySelector('input[name = "sub"]:checked').value);
con = parseInt(document.querySelector('input[name = "con"]:checked').value);
result = variable + sub + con;
document.getElementById("grade").innerHTML = result;
var result2 = "";
if (result == 0) {
result2 = "I don't think you studied."
};
if (result == 33) {
result2 = "You need to spend more time. Try again."
};
if (result == 66) {
result2 = "I think you could do better. Try again."
};
if (result == 99) {
result2 = "Excellent!"
};
document.getElementById("grade2").innerHTML = result2;
return false; // required to not refresh the page; just leave this here
} //this ends the submit function
function myFunction() {
var checked = document.querySelector("input[name = 'variable']:checked");
var value = checked.parentNode.lastChild.id;
var answer;
switch (value) {
case 'demo':
answer = "An octagon is an object with 8 sides to it";
break;
case 'demo2':
answer = "Leprosy is a chronic infection";
break;
case 'demo3':
answer = "Yes ! this is correct";
break;
}
checked.parentNode.lastChild.innerHTML = answer;
}
</script>
hgf
<div> </div>

You can give each explanation span a class name of "explanation" and clear their texts each time you call myFunction().
Here's a working demo https://plnkr.co/edit/9TIwKXIxP8A01DeKVWuG?p=preview
<style>
.quizbox {
width: 58%;
max-width: 950px;
border: 1px gray solid;
margin: auto;
padding: 10px;
border-radius: 10px;
border-width: 5px;
border-color: #00A7AE;
margin-top: 7%;
text-align: center;
position: relative;
background: #73B7DB;
}
.row {
text-align: left;
color: white;
margin-left: 10%;
}
span#demo, #demo2, #demo3 {
display: inline;
color: green;
margin-right: 30%;
float:right;
width:50%;
}
</style>
<div class="quizbox">
<!-- open main div -->
<h1>Quiz</h1>
<form id="form1" action=" ">
<div class="row"> <h3>Moths are a member of what order?</h3></div>
<div class="row">
<input name="variable" type="radio" value="0" />Octagon <span class="explanation" id="demo"></span></div>
<div> </div>
<div class="row">
<input name="variable" type="radio" value="0" />Leprosy <span class="explanation" id="demo2"></span></div>
<div class="row">
<input name="variable" type="radio" value="33" />Lepidoptera <span class="explanation" id="demo3"></span></div>
<p> <input type="submit" onclick="myFunction()" value="Submit" /> </p>
</form>Your grade is: <span id="grade">__</span>
<p id="grade2"></p>
</div>
<!-- close quizbox div -->
<span>fdf</span> <span>fdf</span><span>fdf</span>
fd
<script>
document.getElementById("form1").onsubmit = function(e) {
e.preventDefault();
variable = parseInt(document.querySelector('input[name = "variable"]:checked').value);
sub = parseInt(document.querySelector('input[name = "sub"]:checked').value);
con = parseInt(document.querySelector('input[name = "con"]:checked').value);
result = variable + sub + con;
document.getElementById("grade").innerHTML = result;
var result2 = "";
if (result == 0) {
result2 = "I don't think you studied."
};
if (result == 33) {
result2 = "You need to spend more time. Try again."
};
if (result == 66) {
result2 = "I think you could do better. Try again."
};
if (result == 99) {
result2 = "Excellent!"
};
document.getElementById("grade2").innerHTML = result2;
return false; // required to not refresh the page; just leave this here
} //this ends the submit function
function myFunction() {
var explanations = document.querySelectorAll(".explanation");
for(var x = 0; x < explanations.length; x++) {
explanations[x].innerHTML = "";
}
var checked = document.querySelector("input[name = 'variable']:checked");
var value = checked.parentNode.lastChild.id;
var answer;
switch (value) {
case 'demo':
answer = "An octagon is an object with 8 sides to it";
break;
case 'demo2':
answer = "Leprosy is a chronic infection";
break;
case 'demo3':
answer = "Yes ! this is correct";
break;
}
checked.parentNode.lastChild.innerHTML = answer;
}
</script>
hgf
<div> </div>

In html, add class to all <input name="variable"> (note that you cannot have duplicating name attribute on multiple input):
<input class="variable" ...>
Add lines in your myFunction() to get inputs that is not checked:
function myFunction() {
var notChecked = document.getElementsByClassName('variable');
var checked = document.querySelector("input[name = 'variable']:checked");
var value = checked.parentNode.lastChild.id;
var answer;
switch (value) {
case 'demo':
answer = "An octagon is an object with 8 sides to it";
break;
case 'demo2':
answer = "Leprosy is a chronic infection";
break;
case 'demo3':
answer = "Yes ! this is correct";
break;
}
for (var i = 0, len = notChecked.length; i < len; i++){
notChecked[i].parentNode.lastChild.innerHTML = '';
}
checked.parentNode.lastChild.innerHTML = answer;
}

Javascript quiz not going on to next quiz item

I have a quiz that should move on to the next question once you select an answer but at the moment my code doesn't work and it allows the user to select multiple answers, without anything happening afterwards.
Once they finish the last question their result should be displayed to them.
document.getElementById("beginquiz").addEventListener("click", startQuiz);
function startQuiz() {
document.getElementById("intro").style.display = "none";
document.getElementById("q1").style.display = "block";
}
var answerData = {
"p": 0,
"vp_w": 0,
"vp_e": 0,
"vp_a": 0,
"vp_s": 0
};
var buttons = document.querySelectorAll(".button");
for (var i = 0; i < buttons.length; i++) {
buttons[i].onclick = buttonClicked;
}
function buttonClicked(buttonNext) {
var target = answer.target; //1. 'this' is parent, need target
console.log(target);
//get the current element's data-score value
var selectedType = target.dataset.score; //2. score is the value
//increase the selected answer's 'type' by 1
console.log(selectedType);
answerData[selectedType]++;
//Hide the current question div
this.parentElement.style.display = "none";
//Work out what the next question div is
var nextQuestion = this.parentElement.dataset.next;
//Display the next question element
console.log(nextQuestion);
document.getElementById(nextQuestion).style.display = "block";
if(document.getElementById(nextQuestion))
document.getElementById(nextQuestion).style.display = "block";
else
printResult();
}
function calculateResult (answerData){
var highest = Math.max(total_points.p, total_points.vp_s, total_points.vp_e, total_points.vp_w, total_points.vp_a);
var result;
for (var i in total_points) {
if (total_points.hasOwnProperty(i)){
if (total_points[i] === highest){
result = i;
}
}
}
switch(result) {
case 'p':
result = 'President';
break;
case 'vp_w':
result = 'Vice-President Welfare';
break;
case 'vp_e':
result = 'Vice-President Education';
break;
case 'vp_s':
result = 'Vice-President Sports';
break;
case 'vp_a':
result = 'Vice-President Activities';
break;
default:
break;
}
return result;
};
function printResult() {
document.getElementById('result').innerHTML = '<h2>You are: '+result+'</h2>';
}
.question,
#result {
display: none;
}
.button li {
border: 1px solid;
border-radius: 3px;
background-color: #eee;
text-align: center;
line-height: 2em;
padding: 0.5em;
margin: 0.5em;
width: 80%;
margin: 0 auto;
}
.button li:hover {
color: #bfbfbf;
background-color: #555;
}
#intro,
.question,
#result {
max-width: 600px;
margin: 0 auto;
}
#beginquiz {
border: 1px solid;
border-radius: 3px;
background-color: #eee;
text-align: center;
line-height: 2em;
padding: 0.5em;
margin: 0.5em;
width: 20em;
margin: 0 auto;
}
#beginquiz:hover {
color: #bfbfbf;
background-color: #555;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="intro">
<button id="beginquiz">Start the quiz</button>
</div>
<form name="quiz" method="post" name="buttons" id="quiz" onsubmit="return false">
<div class="question" id="q1" data-next="q2">
<li><div>What is?</div></li>
<input id="answer" type="radio" data-score="p">Answer 1<br>
<input id="answer" type="radio" data-score="vp_a">Answer 2<br>
<input id="answer" type="radio" data-score="vp_s">Answer 3<br>
<input id="answer" type="radio" data-score="vp_w">Answer 4<br>
<input id="answer" type="radio" data-score="vp_e">Answer 5<hr>
</div>
<div class="question" id="q2" data-next="q3">
<li><div>What is?</div></li>
<input id="answer" type="radio" data-score="p">Answer 1<br>
<input id="answer" type="radio" data-score="vp_a">Answer 2<br>
<input id="answer" type="radio" data-score="vp_s">Answer 3<br>
<input id="answer" type="radio" data-score="vp_w">Answer 4<br>
<input id="answer" type="radio" data-score="vp_e">Answer 5<hr>
</div>
<div class="question" id="q3" data-next="q4">
<li><div id="q3" data-next="q4">What is?</div></li>
<input id="answer" type="radio" data-score="p">Answer 1<br>
<input id="answer" type="radio" data-score="vp_a">Answer 2<br>
<input id="answer" type="radio" data-score="vp_s">Answer 3<br>
<input id="answer" type="radio" data-score="vp_w">Answer 4<br>
<input id="answer" type="radio" data-score="vp_e">Answer 5<hr>
</div>
<div class="question" id="q4">
<li><div>What is?</div></li>
<input id="answer" type="radio" data-score="p">Answer 1<br>
<input id="answer" type="radio" data-score="vp_a">Answer 2<br>
<input id="answer" type="radio" data-score="vp_s">Answer 3<br>
<input id="answer" type="radio" data-score="vp_w">Answer 4<br>
<input id="answer" type="radio" data-score="vp_e">Answer 5<hr>
</div>
</form>
<div id="result">
<h2>You are:</h2>
</div>

In your buttonclicked function you had some errors on how you were getting the elements. Here is the updated function. There was another error in the printResults that there was no call to display the results div. You also are not calling the calulateResults functions.
function buttonClicked(buttonNext) {
//var target = answer.target; //1. 'this' is parent, need target
var target;
for(i=answer.length-1;i>=0;i--){
if(answer[i].checked == true){
target = answer[i];
break;
}
}
console.log(target);
//get the current element's data-score value
var selectedType = target.dataset.score; //2. score is the value
//increase the selected answer's 'type' by 1
console.log(selectedType);
answerData[selectedType]++;
//Hide the current question div
console.log(target.parentElement.id);
//this.parentElement.style.display = "none";
target.parentElement.style.display = "none"
//Work out what the next question div is
var nextQuestion = target.parentElement.dataset.next;
//Display the next question element
console.log(nextQuestion);
//document.getElementById(nextQuestion).style.display = "block";
if(document.getElementById(nextQuestion))
document.getElementById(nextQuestion).style.display = "block";
else
printResult();
}
You needed to use a for loop to get the target answer in the array of answers. I decremented the loop to get the last answered question. The other change is to how you got the parent ID. With this.parentElement it was coming back with the body due to the this element was focused on the form, the element the clcik event was fired on. The last thing I commented out the extra document.getElementById(nextQuestion).style.display = "block"; before the check.

Homework help: Returning a value in JavaScript?

I'm working on a homework assignment where we have to make a simple calculator in JavaScript. Here is my code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Calculator</title>
<style>
div{
display: inline-block;
}
#first{
float: left;
position: relative;
top: 65px;
}
#fieldset{
width: 70px;
{
#second{
}
#compute{
position: relative;
{
</style>
<script>
window.onload = function(){
alert('Welcome to the JavaScript Calculator!');
};
function compute() {
var firstValue = document.getElementById("first").value;
var secondValue = document.getElementById("second").value;
var output;
if (document.getElementById("plus").checked === true)
{
output = firstValue + secondValue;
}
else if (document.getElementById("minus").checked === true)
{
output = firstValue - secondValue;
}
else if (document.getElementById("times").checked === true)
{
output = firstValue*secondValue;
}
else if (document.getElementById("divide").checked === true)
{
output = firstValue/secondValue;
}
return output;
}
</script>
</head>
<body>
<header>
<h1>Simple Calculator</h1>
</header>
<form>
<div id="first">
First value: <input type="text" name="FirstValue" />
</div>
<div id="fieldset">
<fieldset id=radio>
<label for="plus">+</label>
<input type="radio" id="plus" name="type" value="plus" checked/><br>
<label for="minus">-</label>
<input type="radio" id="minus" name="type" value="minus"/><br>
<label for="times">x</label>
<input type="radio" id="times" name="type" value="times"/><br>
<label for="divide">÷</label>
<input type="radio" id="divide" name="type" value="divide"/>
</fieldset>
</div>
<div id="second">
Second value: <input type="text" name="SecondValue" />
</div>
<div id="compute">
<button type="button" onclick = "compute();">Compute</button>
</div>
Result:
</form>
</body>
</html>
The calculator won't run, and I think that has something to do with how I've set it up to return. Does returning output print it to the screen? If not, how do I get this to happen? Please help! Thanks.

There was a few things you needed to do.
You needed to get the value inserted into the textbox, not the value of the div.
You also needed to convert the input from a string to a number using parseInt.
Returning the output won't show it on the screen. Instead of returning the output, you needed to add it to the page as an answer by using innerHTML.
Run the code snippet below to see it in action.
<html>
<head>
<meta charset="utf-8" />
<title>Calculator</title>
<style>
div{
display: inline-block;
}
#first{
float: left;
position: relative;
top: 65px;
}
#fieldset{
width: 70px;
{
#second{
}
#compute{
position: relative;
}
</style>
<script>
window.onload = function(){
alert('Welcome to the JavaScript Calculator!');
};
function compute() {
var firstValue = parseInt(document.getElementById("firstValue").value);
var secondValue = parseInt(document.getElementById("secondValue").value);
var output;
if (document.getElementById("plus").checked === true)
{
output = firstValue + secondValue;
}
else if (document.getElementById("minus").checked === true)
{
output = firstValue - secondValue;
}
else if (document.getElementById("times").checked === true)
{
output = firstValue*secondValue;
}
else if (document.getElementById("divide").checked === true)
{
output = firstValue/secondValue;
}
document.getElementById("result").innerHTML = "Result: " + output;
return output;
}
</script>
</head>
<body>
<header>
<h1>Simple Calculator</h1>
</header>
<form>
<div id="first">
First value: <input id="firstValue" type="text" name="FirstValue" />
</div>
<div id="fieldset">
<fieldset id=radio>
<label for="plus">+</label>
<input type="radio" id="plus" name="type" value="plus" checked/><br>
<label for="minus">-</label>
<input type="radio" id="minus" name="type" value="minus"/><br>
<label for="times">x</label>
<input type="radio" id="times" name="type" value="times"/><br>
<label for="divide">÷</label>
<input type="radio" id="divide" name="type" value="divide"/>
</fieldset>
</div>
<div id="second">
Second value: <input id="secondValue" type="text" name="SecondValue" />
</div>
<div id="compute">
<button type="button" onclick="compute();">Compute</button>
</div>
<div id="result">
Result:
</div>
</form>
</body>
</html>

CSS,HTML formatting in a form

I have been trying to create a HTML form consisting of checkboxes in a dropdown. I have been able to do this part. But when you click on a particular dropdown, the remaining dropdown shift down. on the second click th dropdown collapses and they return to their original place. Please help me to correct this problem. I am trying to keep the position of the dropdown constant, if or not the checkboxes are visible.
What I am trying to achieve is something like the filters on the left hand side at http://www.luxuryretreats.com/. Would be thankful for any advise!
Here is the code.
<html>
<head>
<script type="text/javascript">
function ExposeList1() {
var showstatus = document.getElementById('ScrollCountry').style.display;
if (showstatus == 'none') {
document.getElementById('ScrollCountry').style.display = "block";
} else {
document.getElementById('ScrollCountry').style.display = 'none';
}
}
function ExposeList2() {
var showstatus = document.getElementById('Scrollguests').style.display;
if (showstatus == 'none') {
document.getElementById('Scrollguests').style.display = "block";
} else {
document.getElementById('Scrollguests').style.display = 'none';
}
}
function ExposeList3() {
var showstatus = document.getElementById('Scrollminprice').style.display;
if (showstatus == 'none') {
document.getElementById('Scrollminprice').style.display = "block";
} else {
document.getElementById('Scrollminprice').style.display = 'none';
}
}
function ExposeList4() {
var showstatus = document.getElementById('Scrollmaxprice').style.display;
if (showstatus == 'none') {
document.getElementById('Scrollmaxprice').style.display = "block";
} else {
document.getElementById('Scrollmaxprice').style.display = 'none';
}
}
</script>
</head>
<body>
<form action="trying.php" method="post">
<img src="original1.png" onmouseover="this.src='onhover1.png'"
onmouseout="this.src='original1.png'" onclick="ExposeList1()">
<div>
<div id="ScrollCountry"
style="height: 150; width: 200px; overflow: auto; border: 1px solid blue; display: none">
<input type="checkbox" id="scb1" name="c1" value="Mexico">Mexico<br>
<input type="checkbox" id="scb2" name="c2" value="Belize">Belize<br>
<input type="checkbox" id="scb3" name="c3" value="Jamaica">Jamaica<br>
<input type="checkbox" id="scb4" name="c4" value="Thailand">Thailand<br>
<input type="checkbox" id="scb5" name="c5"
value="Turks & Caicos">Turks & Caicos<br>
<br />
</div>
</div>
<img src="original2.png" onmouseover="this.src='onhover2.png'"
onmouseout="this.src='original2.png'" onclick="ExposeList2()">
<div>
<div id="Scrollguests"
style="height: 150; width: 200px; overflow: auto; border: 1px solid blue; display: none">
<input type="checkbox" id="n1" name="n1" value="4">2 - 4<br>
<input type="checkbox" id="n2" name="n2" value="6">4 - 6<br>
<input type="checkbox" id="n3" name="n3" value="8">6 - 8<br>
<input type="checkbox" id="n4" name="n4" value="10">8 -
10<br> <input type="checkbox" id="n5" name="n5" value="30">10+<br>
<br />
</div>
</div>
<img src="original3.png" onmouseover="this.src='onhover3.png'"
onmouseout="this.src='original3.png'" onclick="ExposeList3()">
<div>
<div id="Scrollminprice"
style="height: 150; width: 200px; overflow: auto; border: 1px solid blue; display: none">
<input type="checkbox" id="mn1" name="mn1" value="200">200<br>
<input type="checkbox" id="mn2" name="mn2" value="300">300<br>
<input type="checkbox" id="mn3" name="mn3" value="400">400<br>
<input type="checkbox" id="mn4" name="mn4" value="500">500<br>
<input type="checkbox" id="mn5" name="mn5" value="600">600<br>
<br />
</div>
</div>
<img src="original4.png" onmouseover="this.src='onhover4.png'"
onmouseout="this.src='original4.png'" onclick="ExposeList4()">
<div>
<div id="Scrollmaxprice"
style="height: 150; width: 200px; overflow: auto; border: 1px solid blue; display: none">
<input type="checkbox" id="mx1" name="mx1" value="600">600<br>
<input type="checkbox" id="mx2" name="mx2" value="700">700<br>
<input type="checkbox" id="mx3" name="mx3" value="800">800<br>
<input type="checkbox" id="mx4" name="mx4" value="900">900<br>
<input type="checkbox" id="mx5" name="mx5" value="1000">1000<br>
</div>
</div>
<input type="submit" />
</form>
</body>
</html>
​

You should put a position: absolute on your dropdown list. That way the other dropdown will not be impacted by the fact that you have open / close the other one.

Instead of using the display attribute, use the visibility attribute (visibility = visible | hidden). That would reserve the space required for the DIV irrespective whether is displayed or not.
Modified version here at jsfiddle.