js实现点击切换背景颜色
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>换背景颜色</title><style>#button1 {background-color: red;}#button2 {background-color: yellow;}#button3 {background-color: blue;}</style><script>window.onload = function() {button1.onclick = function() {var test = body1.style.backgroundColor = "red";button1.innerHTML = test;/* alert("2"); */}button2.onclick = function() {var test = body1.style.backgroundColor = "yellow";button1.innerHTML = test;}button3.onclick = function() {var test = body1.style.backgroundColor = "blue";button1.innerHTML = test;}}</script></head><body id="body1"><input type="button" value="button1" id="button1"><input type="button" value="button2" id="button2"><input type="button" value="button3" id="button3"></body></html>
