Make image change with selecting different option in dropdown - Javascript / Html - javascript

I have a system where you are able to choose a car. You can then choose the transmission and color. Different cars and transmissions bring up different colors. Not sure how to make an image appear of a car when a color is chosen. So for example I choose the rs6 and automatic and then the black color. I would then want an image to appear depending on the color chosen. How would I program it so different cars and colors bring up different images. Im relatively new to coding. Any help would be aprreciated.
HTML
<!DOCTYPE html>
<html><head>
<title></title>
</head>
<body>
<form name="CarConfigurator">
<select id="car" name="Car_make">
<option value="" selected="selected">Which car?</option>
<option value="car1">Audi RS6</option>
<option value="car2">BMW M4</option>
<option value="car3">Mercedes C63 AMG</option>
</select>
<br>
<br>
<select id="trans" name="A_M">
<option value="" selected="selected">What trans?</option>
<option value="auto">Automatic</option>
<option value="man">Manual</option>
</select>
<br>
<br>
<select id="color" name="Color">
<option value="" selected="selected">What Color?</option>
<option value="black">Black</option>
<option value="blue">Blue</option>
<option value="red">Red</option>
<option value="white">White</option>
<option value="green">Green</option>
</select>
</form>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1 /jquery.min.js"/
</script>
<script src="configurator.js"></script>
</body>
</html>
Javascript
$("#car").change(function () {
transmission();
});
$("#trans").change(function () {
transmission();
});
function transmission() {
if ($("#car").val() == "car1" && $("#trans").val() == "auto") {
$("option[value$='red']").hide();
$("option[value$='white']").hide();
$("option[value$='green']").hide();
} else {
$("option[value$='red']").show();
$("option[value$='white']").show();
$("option[value$='green']").show();
}
}


For now it is only working for Audi - Automatic - black and blue to show you the basic idea but it is repeating code and you can do the same for the rest of the cars too.
In this example I am setting the src of the image as the car selected. For example if you select car1 and man and red then src of the image as car1manred.jpg, also I'm changing the alt attribute as well so that you can see the change.
you have to do a lot of manual work. I have created an object for the data that will determine how many cars you have in each category. It would be better if you use JSON for that.
Also I have made car1autoblack (which gets the src of the images) as an array but you can make it as an object and include other things about the cars in this category. for example name, price, availability and much more
$("#car").change(function () {
transmission();
selection();
});
$("#trans").change(function () {
transmission();
selection();
});
$("#color").change(function () {
selection();
});
var cars = {
car1autoblack:["car1auto1black1.png","car1auto1black2.jpg"],
car1autoblue:["car1auto1blue1.png","car1auto1blue2.jpg","car1auto1blue3.jpeg"]
}
function transmission() {
if ($("#car").val() == "car1" && $("#trans").val() == "auto") {
$("option[value$='red']").hide();
$("option[value$='white']").hide();
$("option[value$='green']").hide();
} else {
$("option[value$='red']").show();
$("option[value$='white']").show();
$("option[value$='green']").show();
}
}
function selection(){
if ($("#car").val() && $("#trans").val() && $("#color").val()) {
var carVal = $("#car").val();
var transVal = $("#trans").val();
var colorVal = $("#color").val();
var combineVal = carVal+transVal+colorVal;
//var imageLink = combineVal+".jpg";
//$("#showImg").attr("src", imageLink);
//$("#showImg").attr("alt", imageLink);
//console.log(cars[combineVal]);
var inputDivHTML = "";
var car = cars[combineVal];
for(i in car){
inputDivHTML += "<img class='showImg' src='"+car[i]+"' alt='"+car[i]+"'/>";
}
$(".imageHere").html(inputDivHTML);
}
}
img.showImg{
width:150px;
height:70px;
margin:10px 3px;
border:1px solid red;
float:left;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form name="CarConfigurator">
<select id="car" name="Car_make">
<option value="" selected="selected">Which car?</option>
<option value="car1">Audi RS6</option>
<option value="car2">BMW M4</option>
<option value="car3">Mercedes C63 AMG</option>
</select>
<br>
<br>
<select id="trans" name="A_M">
<option value="" selected="selected">What trans?</option>
<option value="auto">Automatic</option>
<option value="man">Manual</option>
</select>
<br>
<br>
<select id="color" name="Color">
<option value="" selected="selected">What Color?</option>
<option value="black">Black</option>
<option value="blue">Blue</option>
<option value="red">Red</option>
<option value="white">White</option>
<option value="green">Green</option>
</select>
</form>
<div class="imageHere">
<img class="showImg" src="http://www.chinabuddhismencyclopedia.com/en/images/thumb/b/b8/Nature.jpg/240px-Nature.jpg"/>
<img class="showImg" src="http://www.chinabuddhismencyclopedia.com/en/images/thumb/b/b8/Nature.jpg/240px-Nature.jpg"/>
<img class="showImg" src="http://www.chinabuddhismencyclopedia.com/en/images/thumb/b/b8/Nature.jpg/240px-Nature.jpg"/>
</div>

Related

Multiple drop down boxes?

I'm trying to get multiple drop down boxes to open when selecting different prompts from an original drop down menu.
So for example the original drop box would say "Continent" then drop down to a list of continents, when you select a continent a new box opens that asks you "Country" then you select a country and a new drop box opens to select a state.
I've been using this template
<script type="text/javascript">
function CheckDepartment(val){
var element=document.getElementById('othercolor');
if(val=='others')
element.style.display='block';
else
element.style.display='none';}
function CheckOption(val){
var element=document.getElementById('misc')
if(val=='misc')
element.style.display='block';
else
element.style.display='block';
}
</script>
</head>
<body>
<select name="color" onchange='CheckDepartment(this.value);'>
<option>pick a color</option>
<option value="red">RED</option>
<option value="blue">BLUE</option>
<option value="others">others</option>
</select>
<select name="othercolor" id="othercolor" onchange='CheckOption(this.value)' style='display:none;'/>
<option value=""></option>
<option value="hi">hi</option>
<option value="misc" id="misc" >misc</option>
</select>
<select name="third" style='display:none;'>
<option value=""></option>
<option value="first">first</option>
<option value="second">second</option>
</select>
but I can't get a third drop box to open when selecting an option from the second drop box.
edit: third box. I think i deleted my last try so this was kinda a recreation of it from what I remembered. I'm also incredibly new at all of this and don't know if anything I tried makes sense.

Here's a simplified demo.
(It assumes only a "yes" value should trigger the display of the next dependent dropdown.)
const
select1 = document.getElementById("select1"),
select2 = document.getElementById("select2");
document.addEventListener("change", handleDropdownDisplay);
function handleDropdownDisplay(event) {
let changedElement = event.target;
if ((changedElement != select1) && (changedElement != select2)) {
return;
}
if (changedElement.value == "yes") {
changedElement.parentElement.nextElementSibling.classList.remove("hidden");
} else {
changedElement.parentElement.nextElementSibling.classList.add("hidden");
}
}
div {
margin-bottom: 0.5em;
}
.hidden {
display: none;
}
<div>
<label for="select1">Show level 2?</label>
<select id="select1">
<option value="no">No</option>
<option value="yes">Yes</option>
</select>
</div>
<div class="hidden">
<label for="select2">Show level 3?</label>
<select id="select2">
<option value="no">No</option>
<option value="yes">Yes</option>
</select>
</div>
<div class="hidden">
<label for="select3">Would your rather</label>
<select id="select3">
<option value="brains">Eat monkey brains</option>
<option value="vba">Write code in VBA</option>
</select>
</div>
(Btw, level 3 doesn't automatically become hidden whenever level 2 becomes hidden. This is probably functionality you'll want to add.)

javascript shows all associated DIVs on a dropdown box select

I am new to javascript and must have looked at almost all of the previous questions here and elsewhere related to this question and none seem to do the trick because they use asp, php, Ajax etc.
I use jQuery code for several other items on the page and have found that their css can cause issues with my pages and am not keen on using it either.
In my case, is there a way to select a country from a drop down box and then display a dropdown box with the states or provinces for that country. My code is shown below but when I run it, it shows all DIVs and not just the DIV that applies to the country selected. If a country has no states/province it will display nothing but passes a value of 0.
I'd like to know what is wrong with this code.
Second question is, the page starts with a default country and its states/provinces but since I use onChange on the country select, the javascript would not be triggered because initially there is no change. Regardless, even when I do change the country from its default, all DIVs are displayed anyway.
Is it possible to show the states/provinces for the default country and still use javascript for any change made to the default selection. It does not show this in the sample below, but the values for the countries and the associated states/provinces come from a database and can therefore not be incorporated in the javascript.
Any help or suggestions will be greatly appreciated.
<TABLE>
<TR><TD>Country</DIV></TD>
<TD><SELECT NAME="countryid" onChange="showstate(this.options[this.selectedIndex].value)">
<OPTION VALUE="NONE">Select a country</OPTION>
<OPTION VALUE="CA" SELECTED>Canada</OPTION>
<OPTION VALUE="US">United States</OPTION>
<OPTION VALUE="ES">Spain</OPTION>
</SELECT></TD>
</TR>
<script>
function showstate(country) {
if (country == "CA") {
hiddenDivUS.style.display='none';
hiddenDivNONE.style.display='none';
hiddenDivCA.style.display='block';
}
else {
if (country == "US") {
hiddenDivCA.style.display='none';
hiddenDivNONE.style.display='none';
hiddenDivUS.style.display='block';
}
else {
hiddenDivCA.style.display='none';
hiddenDivUS.style.display='none';
hiddenDivNONE.style.display='block';
}
}
</script>
<DIV ID="hiddenDivNONE" STYLE="display:none">
<TR><TD><DIV CLASS="inputlabel">Prov/State</DIV></TD>
<TD><INPUT TYPE="hidden" NAME="provid" VALUE="0"></TD>
</TR>
</DIV>
<DIV ID="hiddenDivCA" STYLE="display:none">
<TR><TD><DIV CLASS="inputlabel">Prov/State</DIV></TD>
<TD><SELECT NAME="provid">
<OPTION VALUE="101">British Columbia</OPTION>
.......
<OPTION VALUE="165">Yukon Territories</OPTION>
</SELECT></TD>
</TR>
</DIV>
<DIV ID="hiddenDivUS" STYLE="display:none">
<TR><TD><DIV CLASS="inputlabel">Prov/State</DIV></TD>
<TD><SELECT NAME="provid">
<OPTION VALUE="201">Alaska</OPTION>
.......
<OPTION VALUE="265">Wyoming</OPTION>
</SELECT></TD>
</TR>
</DIV>
</TABLE>
Instead of listing the proper DIV it shows all three of them

First off, careful with your capitals.
Secondly try to keep all js at the bottom of the page.
This code is using ES6 so you might wanna check if it will work in all browsers but you can see whats going on.
el.classList is supported by most browsers however add,remove and toggle are not (were not.. not sure now)
I have used some regex to grab all elements using the id state_ so we can hide them, then we target the exact one to make it visible, you can probably clean that up also.
<style>
.hidden {
display: none;
}
</style>
<select name="countryid" onChange="showState(event)">
<option value="">Select a country</option>
<option value="ca">Canada</option>
<option value="us">United States</option>
<option value="es">Spain</option>
</select>
<div id="state_ca" class="hidden">
This is hidden unless Canada is selected.
</div>
<div id="state_us" class="hidden">
This is hidden unless America is selected.
</div>
<script>
function showState(event) {
const countryCode = event.target.value;
const states = document.querySelectorAll('[id^=state_]');
const el = document.getElementById(`state_${countryCode}`);
states.forEach(el => {
if (el.classList.contains('hidden')) {
return;
}
el.classList.add('hidden');
});
if (el) {
el.classList.remove('hidden');
}
}
</script>

according to me this can be the answer to your problem. You can make a few changes in the code which I have not done.
function addStates() {
var selectCountry = document.getElementById("selectCountry").value;
console.log(selectCountry);
var selectState = document.getElementById("selectState");
if (selectCountry == "india") {
var option1 = document.createElement("option");
option1.value = "punjab";
option1.text = "Punjab";
selectState.add(option1);
var option2 = document.createElement("option");
option2.value = "karnataka";
option2.text = "Karnataka";
selectState.add(option2);
} else if (selectCountry == "usa") {
var option1 = document.createElement("option");
option1.value = "florida";
option1.text = "Florida";
selectState.add(option1);
var option2 = document.createElement("option");
option2.value = "california";
option2.text = "California";
selectState.add(option2);
}
}
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<div>
<div>
<span>Select a country: </span>
</div>
<div>
<select onchange="addStates()" id="selectCountry">
<option value="" selected disabled>Please select a country</option>
<option value="india">India</option>
<option value="usa">USA</option>
</select>
</div>
</div>
<div>
<div>
<span>Please select a state: </span>
</div>
<div>
<select id="selectState">
</select>
</div>
</div>
</body>
</html>

I figured out how to get the desired result (see code below)
<!DOCTYPE HTML>
<HTML>
<HEAD>
<script>
function showStates(country)
{
if (country == "101")
{ document.getElementById('CAprov').style.display='block';
document.getElementById('Default').style.display='none';
document.getElementById('USstate').style.display='none';
document.getElementById('NoProv').style.display='none';
}
else if (country == "102")
{ document.getElementById('CAprov').style.display='none';
document.getElementById('Default').style.display='none';
document.getElementById('USstate').style.display='block';
document.getElementById('NoProv').style.display='none';
}
else
{ document.getElementById('CAprov').style.display='none';
document.getElementById('USstate').style.display='none';
document.getElementById('Default').style.display='none';
document.getElementById('NoProv').style.display='block';
}
return false;
}
</script>
</HEAD>
<BODY TOPMARGIN="0" LEFTMARGIN="0" MARGINHEIGHT="0" MARGINWIDTH="0" BORDER="0">
<FORM METHOD="post">
<TABLE>
<TR><TD>Country</TD>
<TD><SELECT NAME="country" id="country" onChange="showStates(this.options[this.selectedIndex].value);">
<OPTION VALUE="101" SELECTED>Canada</OPTION>
<OPTION VALUE="102">United States</OPTION>
<OPTION VALUE="314">Germany</OPTION>
</SELECT></TD></TR>
<TR ID="Default" STYLE="display: block;"><TD>Province</TD>
<TD><SELECT NAME="provid">
<OPTION VALUE="0">Select province</OPTION>
<OPTION VALUE="139">Newfoundland/Labrador</OPTION>
<OPTION VALUE="143">Nova Scotia</OPTION>
<OPTION VALUE="134">New Brunswick</OPTION>
<OPTION VALUE="149">Prince Edward Island</OPTION>
</SELECT></TD></TR>
<TR ID="CAprov" STYLE="display: none;"><TD>Province</TD>
<TD><SELECT NAME="provid">
<OPTION VALUE="0">Select province</OPTION>
<OPTION VALUE="139">Newfoundland/Labrador</OPTION>
<OPTION VALUE="143">Nova Scotia</OPTION>
<OPTION VALUE="134">New Brunswick</OPTION>
<OPTION VALUE="149">Prince Edward Island</OPTION>
</SELECT></TD></TR>
<TR ID="USstate" STYLE="display: none;"><TD>State</TD>
<TD><SELECT NAME="provid">
<OPTION VALUE="0">Select state</OPTION>
<OPTION VALUE="102">Alabama</OPTION>
<OPTION VALUE="105">Arizona</OPTION>
<OPTION VALUE="106">Arkansas</OPTION>
<OPTION VALUE="108">California</OPTION>
</SELECT></TD></TR>
<TR ID="NoProv" STYLE="display: none;"><TD>Prov/State</TD>
<TD><INPUT TYPE="hidden" NAME="provid" VALUE="0"> </TD></TR>
</TABLE>
</FORM>
</BODY>
</HTML>

Using IF statements in a form to narrow choices down

I basically want to limit my choices in my form so that when a car is chosen as well as the transmission only certain colors may appear. I have created the form. The problem is creating the code in the Javascript file. I don't know how to make it so that if Car 1 is chosen as well as Automatic then for example only Black and blue appear as options. Im relatively new to coding and any help would be appreciated.
Thanks
HTML
<script src="Script\configurator.js" type="text/javascript"></script>
<form name="CarConfigurator">
<select name="Car_make" onchange="Transmission(this.value);">
<option value=" " selected="selected">None</option>
<option value="1">Audi RS6</option>
<option value="2">BMW M4</option>
<option value="3">Mercedes C63 AMG</option>
</select>
<br>
<br>
<select name="A_M" >
<option value="" selected="selected">None</option>
<option value="1" selected="selected">Automatic</option>
<option value="2" selected="selected">Manual</option>
</select>
<br>
<br>
<select name="Color">
<option value="" selected="selected">None</option>
<option value="1">Black</option>
<option value="2">Blue</option>
<option value="3">Red</option>
<option value="4">White</option>
<option value="5">Green</option>
</select>
</form>
Javascript
function Transmission(Car) {
var make = document.CarConfigurator.A_M;
make.options.length = 0;
if (Car == "1") {
make.options[make.options.length] = new Option('Automatic','1');
make.options[make.options.length] = new Option ('Manual','2');
}
if (Car =="2" ) {
make.options[make.options.length] = new Option('Manual','2');
}
if (Car == "3") {
make.options[make.options.length] = new Option('Automatic','3');
}
}

Is this what you want:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<form name="CarConfigurator">
<select name="Car_make" onchange="Transmission();">
<option value=" " selected="selected">None</option>
<option value="1">Audi RS6</option>
<option value="2">BMW M4</option>
<option value="3">Mercedes C63 AMG</option>
</select>
<br>
<br>
<select name="A_M" onchange="Transmission();">
<option value="" selected="selected">None</option>
<option value="1" selected="selected">Automatic</option>
<option value="2" selected="selected">Manual</option>
</select>
<br>
<br>
<select name="Color" onchange="ChoicesMade();">
<option value="" selected="selected">None</option>
<option value="1">Black</option>
<option value="2">Blue</option>
<option value="3">Red</option>
<option value="4">White</option>
<option value="5">Green</option>
</select>
<div id="imageContainer" style="display: none;"><img src="http://buyersguide.caranddriver.com/media/assets/submodel/6873.jpg" /></div>
</form>
<script type="text/javascript">
function Transmission() {
var Car = document.CarConfigurator.Car_make.value;
var make = document.CarConfigurator.A_M.value;
var color = document.CarConfigurator.Color;
color.options.length = 0;
if (Car == "1" && make == '1') {
color.options.add(new Option('Black', '1'));
color.options.add(new Option('Blue', '2'));
}
else if(Car == '2' && make == '1')
{
color.options.add(new Option('Red', '3'));
color.options.add(new Option('White', '4'));
}
ChoicesMade();
}
function ChoicesMade()
{
var form = document.CarConfigurator;
var car = form.Car_make.value;
var make = form.A_M.value;
var color = form.Color.value;
if(car != ' ' && make != '' && color != '')
{
var imageContainer = document.querySelector('#imageContainer');
imageContainer.style.display = 'block';
}
}
</script>
</body>
</html>

You can use objects in JavaScript and then loop through each array in object to change options. For example
var cars = {
"Audi_RS6":{
"name":"Audi RS6",
"Automatic":["color_1","color_2"],
"Manual":["color_1","color_2"]
},
"BMW_M4":{
"name":"BMW M4",
"Manual":["color_1","color_2"]
},
"Mercedes_C63_AMG":{
"name":"Mercedes C63 AMG",
"Automatic":["color_1","color_2"]
}
};
values can be accessed like this
var result = cars.Audi_RS6.Manual[1];

Here you go Duncher, this code does exactly what you want
<!DOCTYPE html>
<html><head>
<title></title>
</head>
<body>
<form name="CarConfigurator">
<select id="car" name="Car_make">
<option value="" selected="selected">Which car?</option>
<option value="car1">Audi RS6</option>
<option value="car2">BMW M4</option>
<option value="car3">Mercedes C63 AMG</option>
</select>
<br>
<br>
<select id="trans" name="A_M">
<option value="" selected="selected">What trans?</option>
<option value="auto">Automatic</option>
<option value="man">Manual</option>
</select>
<br>
<br>
<select id="color" name="Color">
<option value="" selected="selected">What Color?</option>
<option value="black">Black</option>
<option value="blue">Blue</option>
<option value="red">Red</option>
<option value="white">White</option>
<option value="green">Green</option>
</select>
</form>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js">
</script>
<script src="configurator.js"></script>
</body>
</html>
And the JavaScript:
$("#car").change(function () {
transmission();
});
$("#trans").change(function () {
transmission();
});
function transmission() {
if ($("#car").val() == "car1" && $("#trans").val() == "auto") {
$("option[value$='red']").hide();
$("option[value$='white']").hide();
$("option[value$='green']").hide();
} else {
$("option[value$='red']").show();
$("option[value$='white']").show();
$("option[value$='green']").show();
}
}
You will have to make a few tweaks to get your other car & trans combinations working how you want them to (i.e. displaying only the colors you want) by adding more if else statements in the transmission() method but this should get you on your way. This is using jQuery by the way.
Screen shot

How to Merge Java scripts to change font size and font color By getting User Input

I have written separate Javascript to change font color and font size. How to merge it to make the change of both simultaneously to the same font.
`enter code here`
<!DOCTYPE html>
<html>
<body>
<form>
<select onchange="ChangeFont (this);" size="1">
<option value="0.1">0.1</option>
<option value="0.25">0.25</option>
<option value="0.5">0.5</option>
<option value="0.75">0.75</option>
<option selected="1.0">1.0</option>
<option value="1.25">1.25</option>
<option value="1.5">1.5</option>
<option value="1.75">1.75</option>
<option value="2">2</option>
</select>
<span id="fontTest" style="font-size-adjust: 0.6">Change font-size-adjust</span>
</form>
<script type="text/javascript">
function ChangeFont (selectTag) {
// Returns the index of the selected option
var whichSelected = selectTag.selectedIndex;
// Returns the selected options values
var selectState = selectTag.options[whichSelected].text;
var fontTest = document.getElementById ("fontTest");
if ('fontSizeAdjust' in fontTest.style) {
fontTest.style.fontSizeAdjust = selectState;
} else {
alert ("Your browser doesn't support this example!");
}
}
</script>
</body>
</html>
Another one is font color change:
<!DOCTYPE html>
<html>
<body>
</form>
<select name="color" type="text" onchange="changeBackground(this);" >
<option value="select">Select</option>
<option value="blue">Blue</option>
<option value="green">Green</option>
<option value="white">White</option>
<option value="black">Black</option>
</select>
<span id="coltext">This text should have the same color as you put in the text box</span>
</form>
<script>
function changeBackground(obj) {
document.getElementById("coltext").style.color = obj.value;
}
</script>
</body>
</html>
How to merge these two Java scripts? Please help me.

Try this
<!DOCTYPE html>
<html>
<body>
<form>
<select onchange="ChangeBackgroundFont(this,'font');" size="1">
<option value="0.1">0.1</option>
<option value="0.25">0.25</option>
<option value="0.5">0.5</option>
<option value="0.75">0.75</option>
<option selected="1.0">1.0</option>
<option value="1.25">1.25</option>
<option value="1.5">1.5</option>
<option value="1.75">1.75</option>
<option value="2">2</option>
</select>
<select name="color" type="text" onchange="ChangeBackgroundFont(this,'background');" >
<option value="select">Select</option>
<option value="blue">Blue</option>
<option value="green">Green</option>
<option value="white">White</option>
<option value="black">Black</option>
</select>
<span id="fontbackgroundTest" style="font-size-adjust: 0.6">Change font-size-adjust</span>
</form>
<script type="text/javascript">
function ChangeBackgroundFont (selectTag,type) {
if(type=="font") {
// Returns the index of the selected option
var whichSelected = selectTag.selectedIndex;
// Returns the selected options values
var selectState = selectTag.options[whichSelected].text;
var fontTest = document.getElementById ("fontbackgroundTest");
if ('fontSizeAdjust' in fontTest.style) {
fontTest.style.fontSizeAdjust = selectState;
} else {
alert ("Your browser doesn't support this example!");
}
}else{
document.getElementById("fontbackgroundTest").style.color = selectTag.value;
}
}
</script>
</body>
</html>
I did for you enjoy ):

Displaying image based on multiple selection value(s)

I have a multiple selection box that I would like to use the value's from to display images based on selecting these values, eg. if one value is selected then one image would be displayed, if two are selected two would be displayed etc. I would also like a limit on it of three images displayed at once, no matter how many selections.
<select multiple name="item" class="details" action="post" id="mySelect">
<option value="one">One</option>
<option value="two">Two</option>
<option value="three">Three</option>
<option value="four">Four</option>
</select>
Any help would be greatly appreciated, thank you!
What I've tried so far:
<script type="text/javascript">
<!--
function showimage() {
var htmlStr="";
var option = document.getElementById("selectedValue");
for (i=0;i<option.options.length;i++) {
if (option.options[i].selected) {
htmlStr+='<img src="/products/";
htmlStr+=option.options[i].value;
htmlStr+='" /><br />';
}
}
document.getElementById('mySelect').innerHTML = htmlStr;
}
//-->
</script>
The images are located in /products/..

Don't forget to put correct image paths.
function imageFunc(imageid){
var Imageplace=document.getElementById("myImage");
Imageplace.src=imageid;
}
<select multiple name="item" class="details" id="mySelect" onchange="imageFunc(this.value)";>
<option value="1.jpg">One</option>
<option value="2.jpg">Two</option>
<option value="3.jpg">Three</option>
<option value="4.jpg">Four</option>
</select>
<img id="myImage" src="1.jpg"/>

Change your html to this:
<select multiple name="item" class="details" action="post" id="mySelect" onchange="showimage(this.value)">
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>
<option value="4">Four</option>
</select>
And your JavaScript to this:
function showimage(option) {
var htmlStr="";
if(option > 3) {
option = 3;
}
for(i=0;i<option;i++) {
htmlStr+='<img src="/products/' + i + '.jpg" /><br />';
}
document.getElementById('images').innerHTML = htmlStr;
}
All your images should be in the products folder with names: 1.jpg, 2.jpg, ...

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