​x
 
<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    alert("值为: " + $("#test").val());
  });
});
</script>
</head>
​
<body>
<p>名称: <input type="text" id="test" value="Wfuyu教程"></p>
<button>显示值</button>
</body>
</html>