<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>changeDIV</title> <style> #box{ width:100px; height:100px; background:red; margin:20px 80px; } </style> </head> <body> <div id="box"></div> <input type="button" value="变高" onclick="aa()"> <input type="button" value="变宽" onclick="bb()"> <input type="button" value="变色" onclick="cc()"> <input type="button" value="重置" onclick="dd()"> <input type="button" value="隐藏" onclick="ee()"> <input type="button" value="显示" onclick="ff()"> <script> var box window.onload=function(){ box=document.getElementById("box"); } function aa(){ box.style.height="400px"; } function bb(){ box.style.width="400px"; } function cc(){ box.style.background="blue"; } function dd(){ box.style.width="100px"; box.style.height="100px"; box.style.background="red"; } function ee(){ box.style.display="none"; } function ff(){ box.style.display="block"; } </script> </body> </html>
总结:在对网页的布局中,如果想要对DIV的样式做出改变,可以运用JS来改变DIV中的样式,在本节课中,我学到了如何运用JS来改变DIV的样式,声明的变量.style.属性名="属性值",如果属性有“-”号,就写成驼峰形式。要多加练习,好好掌握,深入理解。