<script>
function calculateArea(width, height) {
var area = width * height;
return area;
}
var wallOne = calculateArea(3, 5);
var wallTwo = calculateArea(8, 5)
document.write(wallOne+‘<br>‘);
document.write(wallTwo)
</script>
<script>
function calculateArea(width, height) {
var area = width * height;
return area;
}
var wallOne = calculateArea(3, 5);
var wallTwo = calculateArea(8, 5)
document.write(wallOne+‘<br>‘);
document.write(wallTwo)
</script>
原文：https://www.cnblogs.com/max-hou/p/8733878.html