今天就是在学习XML DOM编程过程中，出现了一个错误，浏览器总是告诉我有一个参数无效，后来经过认真研究终于找到了。
先把代码给大家看看吧。
1
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
2<html>
3<head>
4<title></title>
5<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
6<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
7</head>
8<body onload="initializeBook();">
9 <h1> Wrox Press </h1>
10 <h3> Book Information </h3>
11 <TABLE BORDER="0" CELLSPACING="0" CELLPADDING="0">
12 <TR>
13 <TD>Title:</TD><TD><input id="txtTitle"></TD>
14 </TR>
15 <TR>
16 <TD>Publisher:</TD><TD><input id="txtPublisher"></TD>
17 </TR>
18 <TR>
19 <TD>Published Date:</TD><TD><input id="txtPubDate"></TD>
20 </TR>
21 <TR>
22 <TD>Abstract:</TD><TD><input id="txtAbstract"></TD>
23 </TR>
24 <TR>
25 <TD>Pages</TD><TD><input id="txtPages"></TD>
26 </TR>
27 <TR>
28 <TD>ISBN:</TD><TD><input id="txtISBN"></TD>
29 </TR>
30 <TR>
31 <TD>Price:</TD><TD><input id="txtPrice"></TD>
32 </TR>
33
34</TABLE>
35
36 <input type="button" id="btnUpdate" value="Update Book Info" onclick="updateBookInfo();" />
37
38 <h3>Author:</h3>
39 <table>
40 <tr>
41 <td>Author:</td><td><input id="txtAuthor"></td>
42 </tr>
43 </table>
44 <input type="button" id="btnAddAuthor" value="Add Author" onclick="addAuthor();" />
45 <h3>Catagories:</h3>
46 <table>
47 <tr>
48 <td>Category:</td><td><input id="txtCategory"></td>
49 </tr>
50 </table>
51 <input type="button" id="btnAddCategory" value="Add category" onclick="addCategory();"/>
52
53 <XML id=docBook>
54 <Book>
55 </Book>
56 </XML>
57
58![]()
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出现问题的代码是这一行：
1function renderElements()
2![]()
}
可见，是categoryXSL.documentElement这个参数出了问题，也就是XSL出了问题，但是笔者查了半天也没搞明白，最后终于找到了代码的问题，原来出现错误的代码是这样的：2
1 <XML id=categoryXSL>
2 <DIV xmlns:xsl="http://www.w3.org/TR/wd-xsl">
3 <table border="0" cellpadding="1">
4 <tr>
5 <td><strong>Categories</strong></td>
6 </tr>
7 <xsl:for-each select="/Book/RecSubjCategories/Category">
8 <tr>
9 <td><xsl:value-of select="text()" /></td>
10 </tr>
11 </xsl:for-each>
12 </table>
13 </div><!-- 这行出了问题 -->
14 </XML>
出问题的原因是，由于上面的<DIV xmlns:xsl="http://www.w3.org/TR/wd-xsl">是大写的，而结尾确是小写，自然会有问题，所以把</div>改为</DIV>就可以了，即：2 <DIV xmlns:xsl="http://www.w3.org/TR/wd-xsl">
3 <table border="0" cellpadding="1">
4 <tr>
5 <td><strong>Categories</strong></td>
6 </tr>
7 <xsl:for-each select="/Book/RecSubjCategories/Category">
8 <tr>
9 <td><xsl:value-of select="text()" /></td>
10 </tr>
11 </xsl:for-each>
12 </table>
13 </div><!-- 这行出了问题 -->
14 </XML>
<XML id=categoryXSL>
<DIV xmlns:xsl="http://www.w3.org/TR/wd-xsl">
<table border="0" cellpadding="1">
<tr>
<td><strong>Categories</strong></td>
</tr>
<xsl:for-each select="/Book/RecSubjCategories/Category">
<tr>
<td><xsl:value-of select="text()" /></td>
</tr>
</xsl:for-each>
</table>
</DIV>
</XML>
<DIV xmlns:xsl="http://www.w3.org/TR/wd-xsl">
<table border="0" cellpadding="1">
<tr>
<td><strong>Categories</strong></td>
</tr>
<xsl:for-each select="/Book/RecSubjCategories/Category">
<tr>
<td><xsl:value-of select="text()" /></td>
</tr>
</xsl:for-each>
</table>
</DIV>
</XML>