Salve, Vi spiego il problema.
Sto elaborando un css per la stampa di una pagina realizzata in aspx con C#.
Al momento della creazione del progetto o in debug l'html generato presenta dei tag DIV e javascript di cui non ho il controllo e non posso intervenire quando genero la stampa: mi crea degli spazi vuoti prima della parte interessata da stampare

il codice che mi genera è questo

Codice PHP:
<div>
<input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value="" />
<input type="hidden" name="__EVENTARGUMENT" id="__EVENTARGUMENT" value="" />
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="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" />
</div>
<script type="text/javascript">
//<![CDATA[
var theForm = document.forms['aspnetForm'];
if (!theForm) {
    theForm = document.aspnetForm;
}
function __doPostBack(eventTarget, eventArgument) {
    if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
        theForm.__EVENTTARGET.value = eventTarget;
        theForm.__EVENTARGUMENT.value = eventArgument;
        theForm.submit();
    }
}
//]]>
</script>
<script src="/coa_de/WebResource.axd?d=oOR-_tccayaUc-DI7Y79TA2&amp;t=633719388501875000" type="text/javascript"></script>

<div>

    <input type="hidden" name="__PREVIOUSPAGE" id="__PREVIOUSPAGE" value="dtmhF0P4jLWB_OQAQFVLtNoU7iJFVOlpOd1XB0nXRIVSnqnACQOYgYUBHpYwTk830" />
    <input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEWCAKtsZW9BQKsxeyyCgKHh7d+ApWIg8IHAo6HwfgGAsPv3eAGAsr8plMCltXr7g2UXZcglRPR4CTUkuSshithgeksVQ==" />
</div> 

mi piacerebbe oltre a poter inserire almeno degli ID nei div, anche poter gestire il suffisso "__" alle input e controllo javascript, anch'essi generati in automatico.

Ambiente:
Visual Studio 2005
Sqlserver 2005 Express
Windows xp e windows 2003 server

Grazie