ti faccio un esempio.
pagina prova.htm
codice:
<HTML>
<HEAD>
<script language="javascript">
function ScriviPercentuale(perc){
var str='<table width="100%" height="20"><tr>'
if(perc==100)str+='<td width="100%" bgcolor="green"></td></tr><tr><td align="center">'
else str+='<td width="'+perc+'%" bgcolor="green"></td><td width="'+(100-perc)+'"></td></tr><tr><td colspan="2" align="center">'
str+=perc+'%</td></tr></table>'
document.getElementById('divPercentuale').innerHTML=str
}
</script>
</HEAD>
<BODY>
prova
<iframe name="NomeIframe" src="about:blank" width="0" height="0"></iframe>
<div id="divPercentuale"></div>
</BODY>
</HTML>
pagina.asp
codice:
<%@ Language=VBScript %><%
Response.Buffer=0
%>
<HTML>
<HEAD>
</HEAD>
<BODY><%
totale=4400
for i=1 to totale
percentuale=Round((100*i)/totale)%>
<script>window.parent.ScriviPercentuale(<%=percentuale%>)</script><%
next%>
</BODY>
</HTML>