I believe I’m having a relatively simple problem with a video player implementation in javascript. To start, I want to add a string to an array and reference that first string entry as the src of my source in my video tag. I then want the video to begin playing once the src is received.

I have not implemented the code for the latter since I haven’t gotten past the former yet. I’ve seen people make reference to a .load() function call after changing the src but I don’t know if I’m correctly setting the src to begin with.

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Untitled Document</title>






<script type="text/javascript">
var width = (1280 * 0.1);
var height = (720 * 0.1);
var resized = false;

function getWidth(){
    return width;

function getHeight(){
    return height;

//Create array. Checkbox adds video to list.
//"Submit" button gives first video in list to player.

var videoList = new Array();
var i = 0; //incrementer

//Use checkbox's value as argument
function addVideo(value){
    videoList[i] = value;

function videoSubmit(){
    document.getElementById("player").setAttribute("src", videoList[i]);


<video id="test" width="getWidth()" height="getHeight()">
<source id="player" src="null" type="video/avi" width="getWidth()"     height="getHeight()"/>


<form id="selector" action="">
<input type="checkbox" name="firstvideo" value="test.avi" onClick="addVideo(test.avi)"/> sample 1.avi<br/>


<button onClick="videoSubmit()"> Submit</button>


I’m quite new to javascript and am still trying to wrap my head around it. Any helpful information is greatly appreciated.


Looks like i has the wrong value. Try:

function videoSubmit(){
    document.getElementById("player").setAttribute("src", videoList[ i - 1 ]);

There are a few other issues as well. Here’s a fixed version – enjoy:


Another problem:

You can’t do this:

<video id="test" width="getWidth()" height="getHeight()">

If you want to programatically set those attributes, you must do it the same way you are with the src attribute. Sometimes you’ll see this sort of construct, but it’s clumsy:

<script>document.write('<video id="test" width="' + getWidth() + '" ...')</script>

Unrelated to the Q – you could skip a lot of javascript learning pain by jumping straight to jquery. It does incur a page-load penalty, but it cures a lot of the annoyances of pure javascript. Doing it the old fashioned way will give you “valuable experience” – which those of us who have it value probably more than warranted.


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