為什么我的“JS進(jìn)階篇”顯示兩遍
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>我們互動下</title>
<script type="text/javascript">
??? document.write("JS進(jìn)階篇");
??? alert("關(guān)注JS高級篇");
</script>
</head>
<body>
</body>
</html>
2017-10-24
我也是
2017-09-13
我運(yùn)行了下不會啊，彈出關(guān)注技術(shù)高級篇，打印js進(jìn)階篇