What could be the reason for this script not functioning properly and...?

Here is some HTML code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script type="text/javascript" src="script.js">
</script>
</head>

<body bgcolor="#FFFFCC">
<center>
<form>
 <select id="newLocation">
  <option value="1.jpg">index</option>
   <option value="script.js">posts</option>
   <option value="2.jpg" selected="selected">blog</option>
 </select>
</form>

And here is some JavaScript code:

window.onload = startInit;

function startInit() {
document.getElementById("newLocation").selectedIndex = 0;
document.getElementById("newLocation").onchange = jumpPage;
}

function jumpPage() {
var newLoc = document.getElementById("newLocation");// What does this statement return ?
var newPage = newLoc.options[newLoc.getSelectedIndex].value;
if(newPage != "")
   window.location = newPage;
}

Why isn't the page changing when I select an option from the combo box? Also, what does

document.getElementById("newLocation");
(the first statement of the function jumpPage) return?

Answer №1

If you're looking to experiment, consider

let currentPage = selectedLoc.options[selectedLoc.selectedIndex].value;

This code snippet

let selectedLoc = document.getElementById("selectedLocation"); 

simply locates the specified DOM element

<... id="selectedLocation" ...>
, which in this case is your
<select id="selectedLocation">
.

Answer №2

`, utilizing

document.getElementById("newLocation")
will provide you with the SELECT object, which is essentially the reference to your drop-down menu.

In terms of the JavaScript code, there seems to be an error present. It is advisable for you to update newLoc.getSelectedIndex to newLoc.selectedIndex.

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