upload files in form

Hey I have a form that uploads a file.  I am having trouble with some of the code and hoping someone can help. 

FORM FIELD

<tr>

                          <td><strong>Upload Submission</strong></td>

                    <td><input

                                                  type="file"

                                                  name="submission"

                                                  id="submission"

                                                  value="#FORM.submission#" class="submissionclass"

                                                  /></td>

                </tr>

on submission of the form this code runs

PROCESSING CODE:

<cfif FORM.submission EQ " ">

                  <cfset errors = Errors & "<li>Only PDF, DOC, and DOCX file formats are accepted</li>">

        </cfif>

                    <cfif FORM.submission NEQ " ">

                  <cfif #right(#FORM.submission#, 4)# NEQ "docx" OR #right(#FORM.submission#, 3)# NEQ "doc" OR #right(#FORM.submission#, 3)# NEQ "pdf">

                            <cfset errors = Errors & "<li>Only PDF, DOC, and DOCX file formats are accepted</li>">

                  </cfif>

        </cfif>

The questions is will this work or do I have to do it another way.