Custom search in Sharepoint v1

Hello,
I try to integrate the form of the SPS search engine currently located
in a web section, inside the top of my Intranet site (corresponding to
the title area).
The only visible items of my form are a textfield and a button to
submit the request.
My script is developed in a javascript which is called into the
dbview_ie.xsl file.
I wish launch the search after push the submit button and see the
results due to the SPS search engine.
I successed to give my parameter (in the javascript) to the SPS search
engine but it seems no result was found.
Therefore when I launch the search with SPS search engine, results are
found.

Has somebody an idea about the reason why my search doesn't work after
my first push in the first form ?

Thanks
Vincent.

NB : You could found the code which implements the form with
javascript (inspired by SPS search engine) below.

// Globalized strings for the java script in the search box part.

var L_strInternalPropErr_TEXT = "Erreur interne dans les champs de
propriété. Essayez d'exécuter une autre interrogation.";
var L_strContainsNumericErr_TEXT = "Impossible d'utiliser
l'opérateur Contient pour des propriétés numériques";
var L_strDigitsNumericErr_TEXT = "Vous devez utiliser des nombres
de 0 à 9 pour des propriétés numériques.";
var L_strContainsDateErr_TEXT = "Impossible d'utiliser l'opérateur
Contient pour les propriétés de type date";
var L_strSearchForSomethingErr_TEXT = "Vous devez spécifier un
élément de recherche.";


document.write("<div id=\"WebPartWPQ5\">");
document.write("<form
action=\"http://dattes/Portail-CCCA/Portal/Search\" method=\"post\"
name=\"publishing_SearchForm\" onSubmit=\"return
generateAndSaveSearchQueries();\" target=\"WebPartWPQ1\">");
document.write(" <input type=hidden name=\"publishing_q_SearchScope\"
value = \"This site\" >");
document.write(" <input type=hidden name=\"publishing_qp_value\"
value = \"no_profile\" >");
document.write(" <input type=hidden
name=\"publishing_q_ShowAdvanced\" value = \"false\" >");
document.write(" <input type=hidden name=\"publishing_q_WasAdvanced\"
value = \"false\" >");
document.write(" <input type=hidden
name=\"publishing_q_StartResultRow\" value = \"1\" >");
document.write(" <input type=hidden
name=\"publishing_q_CarriedBestBetCount\" value = \"\" >");
document.write(" <input type=hidden name=\"publishing_qs_clause\"
value = \"\" >");
document.write(" <input type=hidden name=\"publishing_q_categories\"
value = \"\">");
document.write(" <input type=hidden name=\"publishing_q_documents\"
value = \"\" >");
document.write(" <input type=hidden
name=\"publishing_q_DateSearchUsed\" value = \"\"> ");
document.write(" <input type=hidden
name=\"publishing_q_PrevCategoryKeywordConstraints\" value = \"\"
>");
document.write(" <input type=hidden
name=\"publishing_q_PrevDocumentKeywordConstraints\" value = \"\"
>");
document.write(" <input type=hidden
name=\"publishing_q_PrevPropertyConstraints\" value = \"
(&quot;urn:schemas.microsoft.com:fulltextqueryinfo:sourcegroup&quot; =
\'\') AND \" >");
document.write(" <input type=hidden
name=\"publishing_q_SubscriptionQuery\" value = \"\" >");
document.write(" <input type=hidden name=\"SubscribedSearch\"
value = \"\" >");
document.write(" <input type=hidden
name=\"publishing_q_AutoCatEnabled\" value = \"false\" >");
document.write(" <input type=hidden
name=\"publishing_q_HiddenKeyword\" value = \"\" >");
document.write(" <table border=0 cellpadding=0 cellspacing=0>");
document.write(" <td><img
src=./Sources_Specif/Graph_Bandeau/img_rechercher.gif width=66
height=41/></td>");
document.write(" <td><input type=text
name=publishing_q_SearchKeyword size=25 maxlength=4096></td>");
document.write(" <td><input type=image
src=./Sources_Specif/Graph_Bandeau/img_okay.gif width=53
height=41></td>");
document.write(" </table>");
document.write("</form>");
document.write("</div>");

var varPartWPQ5 = RegisterDDSCPart("WPQ5",
"http://dattes/Portail-CCCA/Portal/Search/Search.vbs",
document.all.item('WebPartWPQ5'));