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<td WIDTH="58%" VALIGN="MIDDLE"><font FACE="宋體" LANG="ZH-CN" SIZE="4" COLOR="#ff0000"><!--Figure out which page title to display --></font><font
FACE="System,黑體" LANG="ZH-CN" SIZE="4" COLOR="#ff0000"><b>第8頁：數組</b></font><font
FACE="System,黑體" LANG="ZH-CN"><br>
<br>
<!-- BYLINE --> </font><font FACE="System,黑體" LANG="ZH-CN" SIZE="2">作者：</font><a
HREF="mailto:thau@wired.com"><font FACE="宋體" LANG="ZH-CN" SIZE="2">Thau!</font></a><font
FACE="宋體" LANG="ZH-CN"> <!-- SEE ALSO LINKS --></font></td>
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<td WIDTH="58%" VALIGN="TOP" BGCOLOR="#ffffff"><font FACE="System,黑體" LANG="ZH-CN"><p
ALIGN="JUSTIFY">我們已了解變量可是數字、字符串及對象參數。還<br>
有一個</font><big><font FACE="宋體" LANG="ZH-CN">Javascript</font><font
FACE="System,黑體" LANG="ZH-CN">的重要部分：數組。</big></p>
<p>數組是一種列表。各種列表比如名單、</font><font FACE="宋體"
LANG="ZH-CN">URL</font><font FACE="System,黑體" LANG="ZH-CN">以顏色列<br>
表都可以存儲在數組中。</font> </p>
<font FACE="System,黑體" LANG="ZH-CN"><p>這里我們生成顏色的數組：</p>
<pre>
</font>var colors = new Array("red","blue","green");
</pre>
<font FACE="System,黑體" LANG="ZH-CN"><p>現在你就有了一個數組，你能對它做什么呢？數組<br>
的優點在于數組中的各個元素可以通過數字調用。<br>
第一個元素的數字是</font><font FACE="宋體" LANG="ZH-CN">0</font><font
FACE="System,黑體" LANG="ZH-CN">，可以用以下方式調用：</font> </p>
<font FACE="System,黑體" LANG="ZH-CN"><pre>
</font>var the_element = colors[0];
</pre>
<font FACE="System,黑體" LANG="ZH-CN"><p>執行這一行</font><font FACE="宋體"
LANG="ZH-CN">JavaScript</font><font FACE="System,黑體" LANG="ZH-CN">指令時，變量</font><tt>the_element</tt><font
FACE="宋體" LANG="ZH-CN"> <br>
</font><font FACE="System,黑體" LANG="ZH-CN">所被賦予的值是字符串</font><font
FACE="宋體" LANG="ZH-CN">"red" </font><font FACE="System,黑體" LANG="ZH-CN">。通過寫出數組的名稱<br>
并將數組中元素的順序號放在方括號內就可調用數<br>
組中的該元素。數組中第</font><font FACE="宋體" LANG="ZH-CN">2</font><font
FACE="System,黑體" LANG="ZH-CN">個元素的順序號是</font><font FACE="宋體"
LANG="ZH-CN">1</font><font FACE="System,黑體" LANG="ZH-CN">。</font> </p>
<font FACE="System,黑體" LANG="ZH-CN"><p>一旦生成數組后，你可以添加和修改數組值。如果<br>
你打算將顏色數組的第</font><font FACE="宋體" LANG="ZH-CN">1</font><font
FACE="System,黑體" LANG="ZH-CN">個元素有紅色該為紫色，你<br>
可以這樣做：<br>
<br>
</font><font FACE="宋體" LANG="ZH-CN">colors[0] = "purple";<br>
</p>
</font><font FACE="System,黑體" LANG="ZH-CN"><p>數組經常用于循環。下文將講數組和循環的應用。</font>
</p>
<p><!-- PAGE X LINKS --><!-- this stuff checks if there are more pages in this story. if so, we'll
suck out the titles of those pages and build links. Right now, the maximum is
15 pages. --><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">1</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4.htm"><font FACE="System,黑體" LANG="ZH-CN">第四課介紹</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- PAGE X LINKS --><!-- this stuff checks if there are more pages in this story. if so, we'll
suck out the titles of those pages and build links. Right now, the maximum is 15 pages. --><!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">2</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page2.htm"><font FACE="System,黑體" LANG="ZH-CN">循環介紹</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">3</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page3.htm"><font FACE="System,黑體" LANG="ZH-CN">循環的密碼</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">4</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page4.htm"><font FACE="System,黑體" LANG="ZH-CN">再談</font><font
FACE="宋體" LANG="ZH-CN">WHILE</font><font FACE="System,黑體" LANG="ZH-CN">循環</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">5</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page5.htm"><font FACE="宋體" LANG="ZH-CN">For </font><font
FACE="System,黑體" LANG="ZH-CN">循環</font></a><font FACE="System,黑體" LANG="ZH-CN"
SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">6</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page6.htm"><font FACE="System,黑體" LANG="ZH-CN">嵌套循環</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">7</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page7.htm"><font FACE="System,黑體" LANG="ZH-CN">循環練習</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">8</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page8.htm"><font FACE="System,黑體" LANG="ZH-CN">數組</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">9</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page9.htm"><font FACE="System,黑體" LANG="ZH-CN">數組和循環</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">10</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">:</font><a
HREF="tutorial4_page10.html"><font FACE="System,黑體" LANG="ZH-CN">文件目標模塊中的數組</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">11</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page11.htm"><font FACE="System,黑體" LANG="ZH-CN">函數</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">12</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page12.html"><font FACE="System,黑體" LANG="ZH-CN">無參數函數</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">13</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page13.htm"><font FACE="System,黑體" LANG="ZH-CN">參數及返回值</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="System,黑體" LANG="ZH-CN">第</font><font FACE="宋體" LANG="ZH-CN">14</font><font
FACE="System,黑體" LANG="ZH-CN">頁</font><font FACE="宋體" LANG="ZH-CN" SIZE="2">: </font><a
HREF="tutorial4_page14.htm"><font FACE="System,黑體" LANG="ZH-CN">多于一個參數的函數</font></a><font
FACE="System,黑體" LANG="ZH-CN" SIZE="2"><br>
<!-- this is a mini-template that formats each pageX link. So, if a story
has 15 pages, we need to generate 15 links to it. This is how each one
will look... --> </font><font FACE="宋體" LANG="ZH-CN" SIZE="2"></p>
<p><br>
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