Me picó la curiosidad jeje y use el maravilloso google.com xDDD
<a href='ir.asp?http://www.htmlhelp.com/reference/html40/forms/form.html' target='_blank'>http://www.htmlhelp.com/reference/html40...</a>
Cita: Authors should generally only use a different ENCTYPE when the form includes a TYPE=file INPUT element, in which case the ENCTYPE should be multipart/form-data and the METHOD must be post. The format of multipart/form-data requests is given in RFC 1867.
Presta atencion .. segun dicen, debes usar:
<FORM ENCTYPE="multipart/form-data" METHOD="post">
Pruebalo y nos comentas q tal te fué...
Un saludo,