本文實例為大家分享了使用參數函數實現按鈕顏色切換的具體代碼，供大家參考，具體內容如下
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <button id="btn1" onclick="btn(1)">按鈕1</button> <button id="btn2" onclick="btn(2)">按鈕2</button> <button id="btn3" onclick="btn(3)">按鈕3</button> <script> //設置背景顏色 //如果設置參數函數會節省函數數量吧 //設置flag+參數函數 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> 以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持錯新站長站。
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