第一种：使用jquery：
https://api.jquery.com/load/
这可以加载html中某个id的元素
$( "#result" ).load( "ajax/test.html #container" );
<body>
<div id="page1"></div>
<div id="page2"></div>
<script>
$("#page1").load("page/Page_1.html");
$("#page2").load("page/Page_2.html");
</script>
</body>
第二种：
<head>
</head>
<body>
<div id="page1">
<iframe align="center" width="100%" height="170"
src="page/Page_1.html" frameborder="no" border="0"
marginwidth="0" marginheight="0" scrolling="no"></iframe>
</div>
<div id="page2">
<iframe align="center" width="100%" height="170"
src="page/Page_2.html" frameborder="no" border="0"
marginwidth="0" marginheight="0" scrolling="no"></iframe>
</div>
</body>
第三种：
<head>
<object style="border:0px" type="text/x-scriptlet"
data="page/Page_1.html" width=100% height=150>
</object>
</head>
第四种：
<head>
<link rel="import" href="page/Page_1.html" id="page1">
</head>
<body>
<script>
console.log(page1.import.body.innerHTML);
</script>
</body>