#To make HTML comments
<!--
-->

#To make one line comments
//

#To open and close  Javascript

<script type="text/javascript">
</script>

#To display an alert for a value
alert(variable);

#To create a JavaScript Function
<script type="text/javascript">
...
  function function(value)
{
    ...
}
...
</script>

#To change a string value to integer
parseInt(Variable)

#Create a button in html that on a click do a JavaScript Function with name NAME; the input type must be specifiued in the CSS sheet
<input type="button" onclick="play();" value="NAME" />

#To create selection box with different values
<select onChange='doAudioChannel(this.value)'>
	<option value=1>Stereo</option>
    <option value=2>Reverse stereo</option>
    <option value=3>Left</option>
    <option value=4>Right</option>
    <option value=5>Dolby</option>
</select>

#To create selection box with different values and apply the through JavaScript
<select onChange='doAudioChannel(this.value)'> <!-- In this case the doAudioChannel would be the box id
	<option value=1>Stereo</option> <!-- then the value is setted and the word Stereo is the name given in this box option
    <option value=2>Reverse stereo</option>
    <option value=3>Left</option>
    <option value=4>Right</option>
    <option value=5>Dolby</option>
</select>

<script type="text/javascript">
  function doAudioChannel(value) <!-- Here we will use the box id with the value and the respective function we want to trigger
{
    vlc.audio.channel = parseInt(value);
}
</script>