Salesforce web-to-lead form

<form action="https://www.salesforce.com/servlet/servlet.WebToLead?encoding=UTF-8" method="POST" onsubmit="return validation(this);">
<input type=hidden name="oid" value="your_salesforce_ID">
<input type=hidden name="retURL" value="url_of_redirect_page">
<label for="first_name">*First Name:</label><input  id="first_name" maxlength="40" name="first_name" size="20" type="text" />
<label for="last_name">*Last Name:</label><input  id="last_name" maxlength="80" name="last_name" size="20" type="text" />
<label for="email">*Email Address:</label><input  id="email" maxlength="80" name="email" size="20" type="text" />
<label for="phone">Phone Number:</label><input  id="phone" maxlength="40" name="phone" size="20" type="text" />
<label for="company">*Company</label><input  id="company" maxlength="40" name="company" size="20" type="text" />
<label for="Request_Training_Dates">*Request Training in:</label><select  id="00ND0000004qjQL" name="00ND0000004qjQL" title="Request Training Dates"><option value="">Select a location</option><option value="Amman">Amman</option>
<option value="Amsterdam">Amsterdam</option>
<option value="Atlanta">Atlanta</option>
<option value="Auckland">Auckland</option>
<option value="Bogota">Bogota</option>
<option value="Brisbane">Brisbane</option>
<option value="Buenos Aires">Buenos Aires</option>
<option value="Bury St Edmunds">Bury St Edmunds</option>
<option value="Chennai">Chennai</option>
<option value="Chicago">Chicago</option>
<option value="Christchurch">Christchurch</option>
<option value="Dallas">Dallas</option>
<option value="Denver">Denver</option>
<option value="Doha">Doha</option>
<option value="Dubai">Dubai</option>
<option value="Dublin">Dublin</option>
<option value="Frankfurt">Frankfurt</option>
<option value="Hong Kong">Hong Kong</option>
<option value="Johannesburg">Johannesburg</option>
<option value="London">London</option>
<option value="Melbourne">Melbourne</option>
<option value="Mexico City">Mexico City</option>
<option value="Minneapolis">Minneapolis</option>
<option value="Moscow">Moscow</option>
<option value="Mumbai">Mumbai</option>
<option value="Muscat">Muscat</option>
<option value="New York">New York</option>
<option value="Orlando">Orlando</option>
<option value="Paris">Paris</option>
<option value="Perth">Perth</option>
<option value="Phoenix">Phoenix</option>
<option value="Rio de Janeiro">Rio de Janeiro</option>
<option value="Riyadh">Riyadh</option>
<option value="San Francisco">San Francisco</option>
<option value="San Jose">San Jose</option>
<option value="Singapore">Singapore</option>
<option value="Stockholm">Stockholm</option>
<option value="Sydney">Sydney</option>
<option value="Toronto">Toronto</option>
<option value="Udine">Udine</option>
<option value="Washington DC">Washington DC</option>
</select>
<label for="message">*Message:</label><textarea  id="00ND0000004oVyD" name="00ND0000004oVyD" rows="5" type="text" wrap="soft"></textarea>
<input  id="00ND0000004qhLn" maxlength="255" name="00ND0000004qhLn" size="20" type="hidden" value="Email Campaign" />
<input type="submit" name="submit">
</form>