首页 > 编程 > JavaScript > 正文

JS实现的按钮点击颜色切换功能示例

2019-11-19 15:08:04
字体:
来源:转载
供稿:网友

本文实例讲述了JS实现的按钮点击颜色切换功能。分享给大家供大家参考,具体如下:

先来看看运行效果:

具体代码如下:

<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <title>www.VeVB.COm 点击切换按钮颜色</title></head><body>  <button id="btn1" onclick="btn(1)">按钮1</button>  <button id="btn2" onclick="btn(2)">按钮2</button>  <button id="btn3" onclick="btn(3)">按钮3</button>  <script>    //设置背景颜色    //如果设置参数函数会节省函数数量吧    //设置flag+参数函数    flag = "btn1";    function btn1(){      document.getElementById("btn2").style.color = "black";      document.getElementById("btn3").style.color = "black";      document.getElementById("btn1").style.color = "red";    }    function btn2(){      document.getElementById("btn1").style.color = "black";      document.getElementById("btn2").style.color = "red";      document.getElementById("btn3").style.color = "black";    }    function btn3(){      document.getElementById("btn1").style.color = "black";      document.getElementById("btn2").style.color = "black";      document.getElementById("btn3").style.color = "red";    }    function btn(num){      if(num == 1){        document.getElementById(flag).style.color = "black";        document.getElementById(flag).style.backgroundColor = "white";        document.getElementById("btn1").style.color = "red";        document.getElementById("btn1").style.backgroundColor = "blue";        flag = "btn1";      }      if(num == 2){        document.getElementById(flag).style.color = "black";        document.getElementById(flag).style.backgroundColor = "white";        document.getElementById("btn2").style.color = "red";        document.getElementById("btn2").style.backgroundColor = "blue";        flag = "btn2";      }      if(num == 3){        document.getElementById(flag).style.color = "black";        document.getElementById(flag).style.backgroundColor = "white";        document.getElementById("btn3").style.color = "red";        document.getElementById("btn3").style.backgroundColor = "blue";        flag = "btn3";      }    }  </script></body></html>

更多关于JavaScript相关内容感兴趣的读者可查看本站专题:《JavaScript切换特效与技巧总结》、《JavaScript遍历算法与技巧总结》、《JavaScript查找算法技巧总结》、《JavaScript错误与调试技巧总结》、《JavaScript数据结构与算法技巧总结》及《JavaScript数学运算用法总结

希望本文所述对大家JavaScript程序设计有所帮助。

发表评论 共有条评论
用户名: 密码:
验证码: 匿名发表