html运行实例（eg_js_hoisting

代码示例：（标识：eg_js_hoisting_4）

<!DOCTYPE html>
<html>
<body>

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

<script>
var x = 5;  // 初始化 x

elem = document.getElementById("demo");      // 查找元素
elem.innerHTML = "x is " + x + " and y is " + y;  // 显示 x 和 y

var y = 7;  // Initialize y
</script>

</body>
</html>