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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>移出数组arr中与2相等的元素，并生成一个新数组，不改变原数组。</title> </head> <body> <script> var arr = [1,2,3,4,2,5,6,2,7,2]; var str4 = arr.slice(1,2); var str1 = arr.slice(4,5); var str2 = arr.slice(7,8); var str3 = arr.slice(9); str = str1.concat(str2,str3,str4); document.write("原数组arr：<br/>" + arr); document.write("<br/>"); document.write("移出数组arr中与2相等的元素，并生成一个新数组str：<br/>" + str); document.write("<br/>"); document.write("没有改变原数组arr：<br/>" + arr); </script> </body> </html> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>编写函数实现单击change按钮，为div元素添加红色双线的边框。</title> <style type="text/css"> div{ font-family: "Helvetica Neue",Helvetica,Arial,"Microsoft Yahei",sans-serif; width: 600px; text-align: center; } .haha{ margin-top: 20px; margin-left: 250px; font-size: 20px; } .haha:hover{ border: 3px solid purple; } </style> </head> <body> <div id="joy"> <p>咱们什么都没有，唯一的本钱就是青春。</p> </div> <button class="haha" onclick="myFunction()">change</button> <script type="text/javascript"> function myFunction(){ var Color = document.getElementById("joy"); Color.style.border = "3px double red"; Color.innerHTML = "<p>那就努力改变自己吧，不辜负这大好的青春，不辜负自己！</p>"; } </script> </body> </html>总结：该死的代码，我又成功滴熬夜了 来源：博客园
作者：帕金森？
链接：https://www.cnblogs.com/ckckck/p/11658427.html