ottimo..
ma non mi fa funzionare la funzione onchange....
codice:
<INPUT style="BORDER-RIGHT: #06386A 1px solid; BORDER-TOP: #06386A 1px solid; BORDER-LEFT: #06386A 1px solid; COLOR: #CC0099; BORDER-BOTTOM: #06386A 1px solid; BACKGROUND-COLOR: #DADDE5; FONT-SIZE: 10px; font-family: Verdana; FONT-WEIGHT: bold; width: 14;" maxlength="1" size="1" name="valg1_<%=i%>" type="text" onkeyup="re=/[ap]/gi;if(this.value.match(re)){this.value=this.value.match(re)[0].toUpperCase()}else{this.value=''};" onchange="if(this.value!=''){document.forms['frmInsUsato'].datag1_<%=i%>.value='__/__/____'}else{document.forms['frmInsUsato'].datag1_<%=i%>.value=document.forms['frmInsUsato'].ndata_<%=i%>.value}">