在js中直接添加html语句，js会将html字符串解析成相应的HTML语句，并在前端进行显示。
<span style="font-size:14px;">var el = document.createElement( 'div' );
el.innerHTML = "<html><head><title>titleTest</title></head><body><a href='test0'>test01</a><a href='test1'>test02</a><a href='test2'>test03</a></body></html>";
el.getElementsByTagName( 'a' ); // Live NodeList of your anchor elements</span>
在jquery中进行应用：
var el = $( '<div></div>' );
el.html("<html><head><title>titleTest</title></head><body><a href='test0'>test01</a><a href='test1'>test02</a><a href='test2'>test03</a></body></html>");
$('a', el) // All the anchor elements