(1)代码效果:
主要是学习 函数
(2)实现代码:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>Document</title> <style> #div{width: 100px;height: 100px;background: orange;} </style> </head> <body> <div id="div" onmouseover="document.getElementById('div').style.width='200px';document.getElementById('div').style.height='200px';document.getElementById('div').style.background='green';" onmouseout="document.getElementById('div').style.width='100px';document.getElementById('div').style.height='100px';document.getElementById('div').style.background='orange';" ></div> </body> </html>
。。。。。<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>Document</title> <style> #div{width: 100px;height: 100px;background: orange;} </style> <script> function toGreen(){ document.getElementById('div').style.width='200px'; document.getElementById('div').style.height='200px'; document.getElementById('div').style.background='green'; } function toRed(){ document.getElementById('div').style.width='100px'; document.getElementById('div').style.height='100px'; document.getElementById('div').style.background='orange'; } </script> </head> <body> <div id="div" onmouseover="toGreen()" onmouseout="toRed()"></div> </body> </html>
/////////优化后的JS代码如下所示://///////
<script> function toGreen(){ var oDiv = document.getElementById('div'); oDiv.style.width='200px'; oDiv.style.height='200px'; oDiv.style.background='green'; } function toRed(){ var oDiv = document.getElementById('div'); oDiv.style.width='100px'; oDiv.style.height='100px'; oDiv.style.background='orange'; } </script>