A digression: what is JavaScript?

Here is a WWW page containing some source code that is written in JavaScript:

0024: <HTML> <HEAD> <TITLE> Square demo </TITLE> </HEAD>
0025: <BODY>
0026: <P> Start. </P>
0027: <SCRIPT LANGUAGE="JavaScript">
0028: <!--  hide this script from some browsers
0029: function mysquare(myarg) {
0030:      document.write("<P> Hello once more </P>");
0031:      document.write("<P> <code>myarg</code> is: ", myarg, "</P>");
0032:      return myarg*myarg;
0033: } ;
0034: document.write("<P> Value returned is: ", mysquare(7), "</P>");
0035: //    end of hide -->
0036: </SCRIPT>
0037: <P> Finish. </P>
0038: </BODY> </HTML>

JavaScript is another programming language.
You put JavaScript code in HTML documents with a <SCRIPT> tag.
The JavaScript code is not compiled: instead, it is interpreted by a JavaScript-aware WWW browser. Unlike Java, JavaScript is understood by all browsers, including most of the early versions of Microsoft's Internet Explorer and Netscape's Navigator.
You can access a WWW page containing the above HTML instructions by using the URL http://www.dur.ac.uk/barry.cornelius/papers/a.taste.of.java/code/square.html.
JavaScript has most of Java's expression syntax and basic control flow constructs, but it does not have Java's strong type checking and static typing. You cannot write your own classes.
So, JavaScript is not as powerful as Java. And it is confusing for Java to be included as part of the name JavaScript.