Refernce Form Elements Using Href

I have a problem with reading data from a form element(s). Instead of using a Type=Submit, I have chosen to use a hyper-link to call a select case structure which adds, edits or deletes a record depending on the contents of the action property.

here is a couple of lines showing two text box's in my form, directly following is the href that passes data to the select statement.

<td><input type="text" name="Desc" id="descid" size="55" /></td> <td><input type="text" name="Units" id="Text1" size="4" /></td> </form>

<td align=right><a href="<%= SCRIPT_NAME %>?action=add&jdate=<%= dDate %>"><img src="Web-add.bmp" alt="Add" width="63" height="25" border="0" /></a></td>

I would like to include the values from the form elements in the action string but have so far drawn blanks. I have attached the full form code.