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📁 对javascript的简单介绍和讲解
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    <td bgcolor="#ffff99" width="451">JavaScript高级教程 - 第二课</td>
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    <td bgcolor="#FF6600" width="451"><a href="mailto:thau@wired.com">Thau</a></td>
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      <td width="458" valign="top" align="left" rowspan="2"><small><small><br>
        </small></small><strong>第十页:复杂的cookies读取</strong>
        <p>如果你想让你的cookie包含更多的信息,你可以将cookie的值<br>
          设得很长.假设我们要保存某人的姓名,年龄和电话号码:</p>
        <p>var the_cookie = &quot;username:thau/age:older than the hills/phone:411&quot;;<br>
          <br>
          document.cookie=&quot;my_happy_cookie=&quot; + escape(the_cookie);<br>
          <br>
          我用斜杠/来分割属性名称,用分号区别不同的属性名称及其<br>
          属性值.斜杠/和分号是不是绝对的选择,你可以使用任何的<br>
          字符做分割的标志:<br>
          <br>
          var the_cookie = &quot;username=thau&amp;age=older than the hills&amp;phone=<br>
          411&quot;;<br>
          <br>
          document.cookie=&quot;my_happy_cookie=&quot; + escape(the_cookie);<br>
          <br>
          你可以自行选择限位器.只要你注意在对cookie解码时也使用<br>
          同样的限位器即可.<br>
          <br>
          设置复杂的cookie时方法要复杂一些.我们建议你使用相关数<br>
          组来保存所有的信息,假设我们将该cookie保存到某人的硬<br>
          盘上:<br>
          <br>
          my_happy_cookie=username:thau/age:older than the hills/phone:411<br>
          <br>
          <br>
          你可以将这些信息放到一个方便的相关数组中:<br>
          <br>
          function readTheCookie(the_info)<br>
          <br>
          {<br>
          <br>
          &nbsp;&nbsp;&nbsp; // load the cookie into a variable and unescape it<br>
          <br>
          &nbsp;&nbsp;&nbsp; var the_cookie = document.cookie;<br>
          <br>
          &nbsp;&nbsp;&nbsp; var the_cookie = unescape(the_cookie);<br>
          <br>
          &nbsp;&nbsp;&nbsp; // separate the values from the cookie name<br>
          <br>
          &nbsp;&nbsp;&nbsp; var broken_cookie = the_cookie.split(&quot;=&quot;);<br>
          <br>
          &nbsp;&nbsp;&nbsp; var the_values = broken_cookie[1];<br>
          <br>
          &nbsp;&nbsp;&nbsp; // break each name:value pair into an array<br>
          <br>
          &nbsp;&nbsp;&nbsp; var separated_values = the_values.split(&quot;/&quot;);<br>
          <br>
          &nbsp;&nbsp;&nbsp; // loop through the list of name:values and load<br>
          &nbsp;&nbsp;&nbsp; // up the associate array<br>
          <br>
          &nbsp;&nbsp;&nbsp; var property_value = &quot;&quot;;<br>
          <br>
          &nbsp;&nbsp;&nbsp; for (loop = 0; loop <br>
          <br>
          <br>
          如果在你的JavaScript中有上面这段代码,你可以这样调用它:<br>
          <br>
          var cookie_information = new Array();<br>
          <br>
          readTheCookie(cookie_information);<br>
          <br>
          然后你就会正确设置了cookie_information[&quot;username&quot;],<br>
          cookie_information[&quot;age&quot;], 和cookie_information[&quot;phone&quot;].<br>
          <br>
          这些看起来可能有些难以理解,但实际上并不是很难.我们一<br>
          步步分析:<br>
          var the_cookie = document.cookie; <br>
          将cookie赋值给一个变量.<br>
          var the_cookie = unescape(the_cookie); <br>
          取消escape()的编码<br>
          var broken_cookie = the_cookie.split(&quot;=&quot;);<br>
          var the_values = broken_cookie[1]; <br>
          使the_values等同于username:thau/age:older than the hills/phone:411. <br>
          var separated_values = the_values.split(&quot;/&quot;); <br>
          生成一个包含3个元素名为separated_values的数组:<br>
          separated_values[0] = &quot;username:thau&quot;<br>
          separated_values[1] = &quot;age:older than the hills&quot;<br>
          separated_values[2] = &quot;phone:411&quot;<br>
          <br>
          for (loop = 0; loop <br>
          循环调用separated_values的3个元素.<br>
          property_value = separated_values[loop]; <br>
          提取当前的name:value配对,第1个配对是username:thau.<br>
          var broken_info = property_value.split(&quot;:&quot;); <br>
          将该配对分成名为broken_info的数组中的两个元素: <br>
          broken_info[0] = &quot;username&quot;<br>
          broken_info[1] = &quot;thau&quot;<br>
          <br>
          var the_property = broken_info[0]; <br>
          第1次经过这个循环是,the_property是&quot;username&quot; <br>
          var the_value = broken_info[1]; <br>
          其值是&quot;thau&quot; <br>
          the_info[the_property] = the_value; <br>
          这里开始发回相关数组的便捷功能.它使得the_info<br>
          [&quot;username&quot;] = &quot;thau&quot;,所以现在当你需要从cookie中查找<br>
          username时你只需:<br>
          var the_name = the_info[&quot;username&quot;];<br>
          <br>
          每次经过这个循环时,就在the_info中加入一个新元素.循<br>
          环到最后时, the_info[&quot;username&quot;] = &quot;thau&quot;, the_info<br>
          [&quot;age&quot;] = &quot;old as the hills&quot; ,而 the_info[&quot;phone&quot;] 
          = 411.<br>
          <br>
          有些烦琐,但是当你需要从cookie中输出入大量信息时这是一<br>
          个很好的办法.当然还有别的办法.<a href="day2_11.html">&gt;&gt;</a></p>
        <p><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 color="#FF0000">第一页</font> <a href="day2_1.html">Javascript高级教程-第2日</a><br>
          <font color="#FF0000">第二页</font> <a href="day2_2.html">神奇的字符串处理</a><br>
          <font color="#FF0000">第三页</font> <a href="day2_3.html">子字符串</a><br>
          <font color="#FF0000">第四页</font> <a href="day2_4.html">分割方法(splitting 
          method)</a><br>
          <font color="#FF0000">第五页</font> <a href="day2_5.html">相关数组</a><br>
          <font color="#FF0000">第六页</font> <a href="day2_6.html">相关数组的一个例子</a><br>
          <font color="#FF0000">第七页</font> <a href="day2_7.html">介绍cookie</a><br>
          <font color="#FF0000">第八页</font> <a href="day2_8.html">深入了解cookies</a><br>
          <font color="#FF0000">第九页</font> <a href="day2_9.html">读取cookies</a><br>
          <font color="#FF0000">第十页</font> 复杂的cookies读取<br>
          <font color="#FF0000">第十一页</font> <a href="day2_11.html">读取和编写多重cookies</a><br>
          <font color="#FF0000">第十二页</font> <a href="day2_12.html">再次深入了解cookies</a><br>
          <font color="#FF0000">第十三页</font> <a href="day2_13.html">cookie路径和域</a></p>
        <p><font size="3">[<a href="day1_1.html">第1课</a>][第2课][<a href="day3_1.html">第3课</a>][<a href="day4_1.html">第4课</a>][<a href="day5_1.html">第5课</a>]</font></p>
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