9. JavaScript 變數的宣告answer = 'yes';Document.getElementById('choice').textContent = new Date();
10. Slide 8
11. Slide 9
12. In November 1996, Netscape began working with ECMA International to make JavaScript an industry standard. Since then, the standardized JavaScript is called ECMAScript and specified under ECMA-262, whose latest (nine, ES2018) edition is available in June 2
63. <script>var a = 135;var b = 246;document.write("<br>Before interchange, ");document.write("a = " + a + ", b = " +b);a ^= b ; b ^= a ; a ^= b ;document.write("<br>After interchange, ");document.write("a = " + a + ", b = " +b);</script>
64. <script>var a = 3;var b = 4;document.write("a = " + a + " , b = " + b);var result;result = a == b;document.write("<br>a equals b ? " + result);result = a != b;document.write("<br>a does not equal b ? " + result);result = a > b;document.write("<br>a is gre