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POdocument.reg_page is undefined
 

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    <p>Why are these undefined? They are contained in the form validation js file: </p> <p>var student_name = document.reg_page.student_name.value; var course_id = document.reg_page.course_id.value;</p> <p>When I have this form</p> <pre><code>&lt;div id="container"&gt; &lt;div id="page"&gt; &lt;form name="reg_page" action="thanks.htm" onsubmit = "return form_validation()" method="post"&gt; &lt;table id="form"&gt; &lt;tr&gt; &lt;td colspan="2"&gt;&lt;div id="table_title"&gt;Web Registration Form&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td class="label"&gt;Student Name:&lt;/td&gt;&lt;td&gt;&lt;input name="student_name" id="s" size="15" value="name"/&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td class="label"&gt;Course ID:&lt;/td&gt;&lt;td&gt;&lt;input name="course_id" id="c" size="10" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td class="label"&gt;Select the programming languages you have studied:&lt;/td&gt; &lt;td&gt; &lt;div&gt;&lt;input type="checkbox" name="js" id="y" value="JS" /&gt;JavaScript&lt;/div&gt; &lt;div&gt;&lt;input type="checkbox" name="py" id="y" value="Python" /&gt;Python&lt;/div&gt; &lt;div&gt;&lt;input type="checkbox" name="asp" id="y" value="ASP.NET" /&gt;ASP.NET&lt;/div&gt; &lt;div&gt;&lt;input type="checkbox" name="php" id="y" value="PHP" /&gt;PHP&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td class="label"&gt;Expected Year of Graduation:&lt;/td&gt; &lt;td&gt; &lt;div&gt;&lt;input type="radio" name="year" id="y" value="2011" /&gt;2011&lt;/div&gt; &lt;div&gt;&lt;input type="radio" name="year" id="y" value="2012" /&gt;2012&lt;/div&gt; &lt;div&gt;&lt;input type="radio" name="year" id="y" value="2013" /&gt;2013&lt;/div&gt; &lt;div&gt;&lt;input type="radio" name="year" id="y" value="2014" /&gt;2014&lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td colspan="2" id="buttons"&gt; &lt;input type="submit" name="sub" value="Log In" id="s" /&gt; &lt;input type="reset" name="re" value="Clear Form" id="r" /&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;/form&gt; &lt;/div&gt; </code></pre>
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