<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http:/ /cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js"></script>
<script>
$(document).ready(function() {
$("#btn1"). btn2").click(function(){
("#btn3").click(function(){
/script>
</head>
<body>
<p id="test1" ><a href="//m.sbmmt.com" >This This is the <B>bold</B> part of the paragraph</p>
<p id="test2" >This is the <B>bold</B> Part</p>
<p >Part:<input type="text" id="test3" value="中文网"></p>
<button id= "btn1">Set text</button>
<button id="btn2">Set html</button>
<button id="btn3">Set table parameters</ button>
</body>
</html>
After pressing btn1, btn2, and btn3, the settings are normal, but they all automatically jump to the php Chinese website page. I don’t understand why. What's going on?
btn1 jumps to the past and I can still understand it (actually I don’t understand why)
btn2 and btn3 will jump after setting them up, I’m confused
Please give me some explanation !
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
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