console
<input type="text">
<input type="text" id="abc">
<input type="password" id="pwd">
<input type="button" class="button">
<br>
<img title="w3c" src="http://jsrun.net/res/favicon.png" />
<br />
<a title="w3c" href="http://w3school.com.cn">W3School</a>
<hr />
input[type=text]{width:50px;height:50px;background:#aaa;}
input[type=text][id=abc]{width:50px;height:50px;background:blue;}
input[id=pwd]{width:50px;height:50px;background:red;}
input[class=button]{width:50px;height:50px;background:green;}
[title=w3c]{border:2px solid blue;}