html运行实例（eg_js_function_expression

代码示例：（标识：eg_js_function_expression_variable）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 函数</h1>

<p>函数存储在变量后，变量可以用作函数：</p>

<p id="demo"></p>

<script>
var x = function (a, b) {return a * b};
document.getElementById("demo").innerHTML = x(4, 3);
</script>

</body>
</html>