JavaScript executes your code accordingly even if you forget a semicolon at the end of the line.
You must use a semicolon to separate the two pieces of code when putting two independent pieces of code on one line.
<html>
<body>
<SCRIPT LANGUAGE="JavaScript">
<!--
// Declare 2 numeric variables on the same line
var varA = 5; var varB = 0.06;
;
document.write(varA*varB);
-->
</SCRIPT>
</body>
</html>