java script による画像の置換
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> </head> <body> <nav> <li> <a href="#"><img src="aaa.jpg" width="160" height="60" alt="" onMouseOver="this.src='bbb.jpg' " onMouseOut="this.src='aaa.jpg'"></a> </li> </nav> </body> </html>