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這個是例如了CSS的margin負值和相對定位做的一個圖片放大的效果。圖片開始只是局部的，鼠標放上去顯示整個圖片。

<!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"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>無標題文檔</title> <style> body{ font-size:12px; } ul,li,ol{ margin:0; padding:0; list-style:none; } .box{ margin:100px; clear:both;  border:1px solid #000; } .box ul li{ list-style:none; float:left; width:60px; height:60px; margin-left:10px; text-align:center;  border:1px solid #ccc;  } .box ul li a{ display:block; background:#f2f2f2; width:60px; height:60px; overflow:hidden; } .box a img{ margin:-25px 0px 0px -25px; border:0; } .box a:hover{ width:105px; height:140px; border:4px solid #f2f2f2; margin:-40px -50px -80px -50px; padding:1px; position:relative;  }/* 設置相對定位后才能蓋住后面的層 */ .box a:hover img{ margin:0; border:0;  } .clear{clear:both;overflow:hidden;height:0;} </style> </head> <body>      <ul>         <li><img src="/d/file/itjie/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>Scriptjishu/2014-10-23/292c32de27237a13e12e5835f42f9f00.jpg" widt="105" height="140" ></li>         <li><img src="/d/file/itjie/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>Scriptjishu/2014-10-23/292c32de27237a13e12e5835f42f9f00.jpg" widt="105" height="140"  ></li>         <li><img src="/d/file/itjie/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>Scriptjishu/2014-10-23/292c32de27237a13e12e5835f42f9f00.jpg" widt="105" height="140"  ></li>         <li><img src="/d/file/itjie/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>Scriptjishu/2014-10-23/292c32de27237a13e12e5835f42f9f00.jpg" widt="105" height="140"  ></li>         <li><img src="/d/file/itjie/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>Scriptjishu/2014-10-23/292c32de27237a13e12e5835f42f9f00.jpg" widt="105" height="140"  ></li>         <li><img src="/d/file/itjie/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>Scriptjishu/2014-10-23/292c32de27237a13e12e5835f42f9f00.jpg" widt="105" height="140"  ></li>         <li><img src="/d/file/itjie/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>Scriptjishu/2014-10-23/292c32de27237a13e12e5835f42f9f00.jpg" widt="105" height="140"  ></li>         <li><img src="/d/file/itjie/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>Scriptjishu/2014-10-23/292c32de27237a13e12e5835f42f9f00.jpg" widt="105" height="140"  ></li>         <li><img src="/d/file/itjie/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>Scriptjishu/2014-10-23/292c32de27237a13e12e5835f42f9f00.jpg" widt="105" height="140"  ></li>         <li><img src="/d/file/itjie/<a href=/itjie/Javajishu/ target=_blank class=infotextkey>Java</a>Scriptjishu/2014-10-23/292c32de27237a13e12e5835f42f9f00.jpg" widt="105" height="140"  ></li>     </ul>       </body> </html> </html>

[Ctrl+A 全選注:如需引入外部Js需刷新才能執行]

JavaScript技術：js實現圖片顯示局部，鼠標經過顯示全部的效果，轉載需保留來源！

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js實現圖片顯示局部，鼠標經過顯示全部的效果

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