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display div according to select option
display div according to select option

5+ Year Member

Msg#: 3056420 posted 10:38 pm on Aug 22, 2006 (gmt 0)


Im new to javascript / ajax which is evident. Im trying to show hide divs based on the selected option in a select menu. Here's what I have:

function updateEvents() {
var events = document.getElementById("displayevents").value;
if (events == 'b') {
document.getElementById("day").style.display = 'block';
document.getElementById("weekend").style.display = 'none';
if (events == 'c') {
document.getElementById("day").style.display = 'none';
document.getElementById("weekend").style.display = 'block';
else {
document.getElementById("day").style.display = 'block';
document.getElementById("weekend").style.display = 'block';

This isn't working, can anyone help?

Thanks in advance



WebmasterWorld Senior Member rocknbil us a WebmasterWorld Top Contributor of All Time 10+ Year Member

Msg#: 3056420 posted 6:44 pm on Aug 23, 2006 (gmt 0)

You don't show the most important part, the select dropdown. :-) Let's assume it's

<select name="displayevents" id="displayevents" onChange="updateEvents();">

What is happening is you are referencing the selected options's value incorrectly which could have been found by adding alert(event) in the function. You get at the selected option value by referencing the selectedIndex. But here's an easier way: you use the this keyword to pass the select object's value itself to the function. Note how "event" is now a passed parameter, no need to get it's selected index and value in the function.....

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Update Events</title>
<script type="text/javascript">
function updateEvents(events) {
var day = document.getElementById('day'); // The day div OBJECT
var weekend = document.getElementById('weekend'); // the weekend div OBJECT
day.style.display = ((events=='b') (events==''))?'block':'none'; // Assign style
weekend.style.display = ((events=='b') (events==''))?'none':'block'; //properties to the objects
<div id="somediv">
<select name="displayevents" id="displayevents"
<option value="">Select</option>
<option value="b">Bee</option>
<option value="c">Cee</option>
<div id="day" style="display:block;"> Day</div>
<div id="weekend" style="display:none;"> Weekend</div>

NOTE: The ¦ represents the UNBROKEN vertical pipe, the logical "or" operator.


5+ Year Member

Msg#: 3056420 posted 9:35 pm on Aug 23, 2006 (gmt 0)

Thanks for taking the time to reply rocknbil, much appreciated

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