📄 day4_2.html
字号:
<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312-80"><style type="text/css"><!--a:link { color: blue; text-decoration: none}a:visited { color: purple; text-decoration: none}a:hover { color: #CC0033; text-decoration: underline}--></style><title>JavaScript高级教程</title><script language="JavaScript"><!-- hide me// timedAlert// this just calls a function timedAlert(){ var the_timeout = setTimeout("alertAndRedirect();", 3000);}function alertAndRedirect(){ alert('OK! Exhale!'); window.location.replace("day3_2.html");}function writeInForm(text_to_write){ window.document.the_form.the_text.value= text_to_write;}// show me --></script></head><body topmargin="1" leftmargin="2"><table border="0" width="591" cellspacing="0"> <tr> <td bgcolor="#ffff99" width="451">JavaScript高级教程 - 第四课</td> </tr> <tr> <td bgcolor="#FF6600" width="451"><a href="mailto:thau@wired.com">Thau</a></td> </tr></table><div align="left"> <table border="0" width="630" cellspacing="0"> <tr> <td width="458" valign="top" align="left" rowspan="2"><small><small><br> </small></small><strong>第二页：<font size="3">图象映射与<font face="verdana, arial, geneva, sans-serif">JavaScript</font></font></strong> <table width="452"> <tr> <td width="448"> <font face="verdana, arial, geneva, sans-serif" size="2"></font><font size="3">一个图象映射由一些区域组成，每个区域对应于一个相关联<br> 的超级链接，当你点击那个区域就把你带到那个链接。这里<br> 是一个简单的例子，从</font><font face="verdana, arial" size="3">Patrick</font>的图象映射<a href="http://www.hotwired.com/webmonkey/html/96/40/index2a.html_tw=html" target="_blank">教程</a>里拿来的（稍<br> 稍有些改动）<font size="3"> <p><font face="verdana, arial"></font><!--webbot bot="ImageMap" rectangle="(20,20) (70,60) http://www.mattmarg.com/" rectangle="(90,20) (140,60) http://www.hits.org/" rectangle="(20,80) (70,120) http://www.hotwired.com/surf/central/" rectangle="(90,80) (140,120) http://www.fractalcow.com/bert/bert.htm" SRC="my_image.gif" border="0" ismap startspan --><MAP NAME="FrontPageMap"> <AREA SHAPE="RECT" COORDS="20, 20, 70, 60" HREF="http://www.mattmarg.com/"> <AREA SHAPE="RECT" COORDS="90, 20, 140, 60" HREF="http://www.hits.org/"> <AREA SHAPE="RECT" COORDS="20, 80, 70, 120" HREF="http://www.hotwired.com/surf/central/"> <AREA SHAPE="RECT" COORDS="90, 80, 140, 120" HREF="http://www.fractalcow.com/bert/bert.htm"> </MAP><a href="../../_vti_bin/shtml.exe/javascript/advance_course/day4_2.html/map"><img ismap usemap="#FrontPageMap" border="0" height="140" src="my_image.gif" width="160"></a><!--webbot bot="ImageMap" endspan i-checksum="50308" --> </p> </font> <p><font size="3"> <font face="verdana, arial"></font>虽然这是一个整的图象，但<font face="verdana, arial">Patrick</font>把它设计成图象的不同部<br> 分对应于不同的链接。在网上象这种图象映射到处都是，最<br> 常见的是用这种技术做的导航条。 如果你对此还不熟悉，请<br> 去看看<font face="verdana, arial">Patrick</font></font>的客户端图象映射<a href="http://www.hotwired.com/webmonkey/html/96/40/index2a.html_tw=html" target="_blank">教程</a><font size="3">。作为一个快速温习，<br> 上面的图象映射的<font face="verdana, arial">HTML</font>代码是这样的：</font> </td> </tr> </table> <blockquote> <pre><big></big><IMG SRC="http://static.wired.com/html/96/39/stuff/my_image.gif" border=0 WIDTH=160 HEIGHT=140 ismap usemap="#foo"><map name="foo"><area name="yellow" href="http://www.mattmarg.com/" coords="20,20,70,60"><area name="red" href="http://www.hits.org/" coords="90,20,140,60"><area name="blue" href="http://www.hotwired.com/surf/central/" coords="20,80,70,120"><area name="green" href="http://www.fractalcow.com/bert/bert.htm" coords="90,80,140,120"></map><big></big></pre> </blockquote> <table width="453"> <tr> <td valign="middle" width="449"><font size="3">请注意<font face="verdana, arial"><img src> </font>标记中有一项叫 <font face="verdana, arial"><tt>usemap="#foo"</tt>.</font> 它<br> 告诉图象去找一个名字叫<font face="verdana, arial">"foo"</font>的<font face="verdana, arial">map</font>标记用到这幅图象上。<br> <font face="verdana, arial">map</font>标记可以出现在页面代码的任何地方，但一般来说把它<br> 放在图象代码的旁边总是个好主意，就象你这里看到的，这<br> 样找到和修改它更容易一些。 <p><font face="verdana, arial">map</font>标记有一个开始和结束标志，中间是一系列的<font face="verdana, arial">area</font><font size="3">标记，<br> 每个<font face="verdana, arial">area</font>标记用</font><font face="verdana, arial" size="4"><tt>coords</tt></font><font size="3">元素定义了一个区域并赋予其一个<br> 链接。<font face="verdana, arial">coords</font>元素是一个由几个数组成的字符串，每个数代<br> 表图象上某个象素的坐标。如果定义的区域是方型，则四个<br> 象素的顺序应该是：左上，右上，左下，右下。 </font></p> <font size="3"> <p> <font face="verdana, arial"></font>往这种图象映射上增加<font face="verdana, arial">JavaScript</font>代码与往超文本链接上增<br> 加是一样容易的。实际上<font face="verdana, arial">JavaScript</font>几乎把<font face="verdana, arial">area</font>标记与超文<br> 本链接完全一样看待。所以你也可以把<font face="verdana, arial"><tt>onClicks</tt>, <tt>onMouseOvers</tt></font><br> 和<font face="verdana, arial"><tt>onMouseOuts</tt></font>等这些事件加到<font face="verdana, arial">area</font>标记中，而其效果与你希<br> 望的完全一样。这里还是上面的那个例子，不过加了一些<br> <font face="verdana, arial">JavaScript</font>语句 : </p> <font face="verdana, arial"> <form name="the_form"> <p><!--webbot bot="ImageMap" rectangle=" (20,20) (70,60) http://www.mattmarg.com/" rectangle=" (90,20) (140,60) http://www.hits.org/" rectangle=" (20,80) (70,120) http://www.hotwired.com/surf/central/" rectangle=" (90,80) (140,120) http://www.fractalcow.com/bert/bert.htm" WIDTH="160" HEIGHT="140" SRC="http://static.wired.com/html/96/39/stuff/my_image.gif" border="0" ismap startspan --><MAP NAME="FrontPageMap1"> <AREA SHAPE="RECT" COORDS="20, 20, 70, 60" HREF="http://www.mattmarg.com/"> <AREA SHAPE="RECT" COORDS="90, 20, 140, 60" HREF="http://www.hits.org/"> <AREA SHAPE="RECT" COORDS="20, 80, 70, 120" HREF="http://www.hotwired.com/surf/central/"> <AREA SHAPE="RECT" COORDS="90, 80, 140, 120" HREF="http://www.fractalcow.com/bert/bert.htm"> </MAP><a href="../../_vti_bin/shtml.exe/javascript/advance_course/day4_2.html/map1"><img ismap usemap="#FrontPageMap1" border="0" height="140" src="http://static.wired.com/html/96/39/stuff/my_image.gif" width="160"></a><!--webbot bot="ImageMap" endspan i-checksum="7124" --> <textarea rows="10" cols="20" name="the_text"></textarea> </p> </form> </font> <p><font face="verdana, arial"></font>这个增加了<font face="verdana, arial">JavaScript</font>语句的图象映射的代码是这样的： </font></font></td> </tr> </table> <blockquote> <pre><big></big><map name="javascript_foo"><area name="yellow" href="http://www.mattmarg.com/" onMouseOver="writeInForm('All Hail Mattmarg!');" coords="20,20,70,60"><area name="red" href="http://www.hits.org/" onMouseOver="writeInForm('Humboldt Institute of Technological Studies');" coords="90,20,140,60"><area name="blue" href="http://www.hotwired.com/surf/central/" onMouseOver="writeInForm('The good, the bad, and the utterly useless');" coords="20,80,70,120"><area name="green" href="http://www.fractalcow.com/bert/bert.htm" onMouseOver="writeInForm('Plush antichrist revealed');" coords="90,80,140,120"></map><big></big></pre> </blockquote> <table width="468"> <tr> <td width="464"><font size="3">它和原来的代码相当类似，唯一的差别就是在每个<font face="verdana, arial"><area></font>标记<br> 中增加了一个<font face="verdana, arial"><tt>onMouseOver</tt></font>事件处理，调用了一个我写的叫做<br> <font face="verdana, arial"><tt>writeInForm()</tt></font>的函数, 这个函数是这样的:<font face="verdana, arial"> </font></font></td> </tr> </table> <blockquote> <pre><big></big><script language="JavaScript"><!-- hide mefunction writeInForm(text_to_write){ window.document.the_form.the_text.value= text_to_write;}// show me --></script><big></big></pre> </blockquote> <table width="458"> <tr> <td width="454"><font size="3">太简单了是吗? 来个稍复杂点儿的，我们学学怎么用<font face="verdana, arial">JavaScript</font><br> 来预装入图象。<a href="day4_3.html"><font face="verdana, arial">>></font></a></font></td> </tr> </table> <p align="left"><font face="宋体" size="3" color="#000000"><strong>JavaScript高级教程</strong></font><font color="#FF0000" face="宋体" size="3"><br> </font><font size="3"><font color="#FF3300">第一页</font> <a href="day4_1.html"><font face="verdana, arial, geneva, sans-serif">JavaScript</font>高级教程<font face="verdana, arial, geneva, sans-serif">- </font>第<font face="verdana, arial, geneva, sans-serif">4</font>天</a> <br> <font color="#FF3300">第二页 </font>图象映射与<font face="verdana, arial, geneva, sans-serif">JavaScript<br> </font><font color="#FF3300">第三页 </font><a href="day4_3.html">预装图象 - 是什么<font face="verdana, arial, geneva, sans-serif">?</font></a><font face="verdana, arial, geneva, sans-serif"><br> </font><font color="#FF3300">第四页 </font><a href="day4_4.html">预装图象 - 怎么做?</a><font face="verdana, arial, geneva, sans-serif"><br> </font><font color="#FF3300">第五页 </font><a href="day4_5.html">对象的优点</a><br> <font color="#FF3300">第六页 </font><a href="day4_6.html">创建你自己的对象</a><br> <font color="#FF3300">第七页 </font><a href="day4_7.html">你的面向对象的虚拟宠物</a><br> <font color="#FF3300">第八页 </font><a href="day4_8.html">计算字符串</a><br> <font color="#FF3300">第九页 </font><a href="day4_9.html">获取难以索引的对象</a><br> <font color="#FF3300">第十页 </font><a href="day4_10.html">另一种获取难以索引的对象的手段</a><br> <font color="#FF3300">第十一页 </font><a href="day4_11.html">第四天课程复习</a></font></p> <p>[<a href="day1_1.html">第1课</a>][<a href="day2_1.html">第2课</a>][<a href="day3_1.html">第3课</a>][第4课][<a href="day5_1.html">第5课</a>]</p> <hr align="left"> <!--webbot bot="Include" U-Include="../../copyright.html" TAG="BODY" startspan --> <p><font face="verdana, arial, geneva, sans-serif" size="2"><a href="http://phtshop.yeah.net" target="_top">本文根据 网猴 相关文章改编，版权归原作者所有。</a> </font><font color="#000000"><span class="smallfont"></span></font></p> <!--webbot bot="Include" endspan i-checksum="15926" --> </td> </tr> <tr> </tr> </table></div></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -