si' effettivamente ho notato che non fa allegare zip
ecco il codice html:
codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//IT"
http://www.w3.org/TR/html4/loose.dtd>

<html>

<head>
	
	<link rel="stylesheet" type="text/css" href="layout_1.css">
	
	<title>
		Programme of Conference
	</title>
	
</head>

<body>

	testo senza paragrafo
	
	<h2>Programme of the Conference</h2>

	
	<table width="650" align="center">
		<p class="testo">
		There will be two introductory plenary lectures, 11 invited lectures and 21 contributed talks.

		There will be also two after dinner poster sessions on Thursday.

		A short (1 minute, 1 trasparency per poster) presentation of the posters will be given on the same day immediately before dinner.

		Poster discussion will be held on Thursday after dinner.

		Poster Session A will be concerned with the even numbered posters. Poster Session B will be concerned with the odd numbered posters.

		

		Accompaying person activities

		Some accompanying person activities will be arranged at the time of the conference.
		</p>
	</table>

	


	<p class="testo2">prova testo verde</p>
	<p class="testo3">prova testo magenta</p>
	
	<table class="principale" align="center">
		<tr class="primariga">
			<td>&nbsp</td>
			<td>Sunday 1</td>
			<td>Monday 2</td>
			<td>Tuesday 3</td>
			<td>Wednesday 4</td>
			<td>Thursday 5</td>
		</tr>
		
		<tr>
			<td>9:00-10:00</td>
			<td rowspan="2">ARRIVAL</td>
			<td>D.C. Clary</td>
			<td>M.E. Casida</td>
			<td>C. Millot</td>
			<td>G. Cruciani</td>
		</tr>
		
		<tr>
			<td>10:00-11:00</td>
			<td>P. Szalay</td>
			<td>A. Bottoni</td>
			<td>A.P. Jansen</td>
			<td>J.C. Rayez</td>
		</tr>
		
		<tr>
			<td>11:00-11:30</td>
			<td rowspan="4">R
E
G
I
S
T
R
A
T
I
O
N</td>
			<td>Coffee Break</td>
			<td>Coffee Break</td>
			<td>Coffee Break</td>
			<td>Coffee Break</td>
		</tr>
		
		<tr>
			<td>11:30-12:00</td>
			<td>S. Evangelisti</td>
			<td>M. Mroginski</td>
			<td>A. Tchougreeff</td>
			<td>G. Scalmani</td>
		</tr>
		
		<tr>
			<td>12:00-12:30</td>
			<td>V. Speybroeck</td>
			<td>A. Toro-Labbe</td>
			<td>E. Bichoutskaia</td>
			<td>F. Negri</td>
		</tr>
		
		<tr>
			<td>12:30-13:00</td>
			<td>O. Gervasi</td>
			<td>C. Marsden</td>
			<td>G. Gueorguiev</td>
			<td>M. Garavelli</td>
		</tr>
		
		<tr>
			<td>13:00-14:00</td>
			<td>Lunch</td>
			<td>Lunch</td>
			<td>Lunch</td>
			<td>Lunch</td>
			<td>Lunch</td>
		</tr>
		
		<tr>
			<td>14:00-17:00</td>
			<td>Free Time</td>
			<td>Free Time</td>
			<td rowspan="6"><a href="http://www.google.it">T
O
U
R</a></td>
			<td>Free Time</td>
			<td>Free Time</td>
		</tr>
		
		<tr>
			<td>17:00-18:00</td>
			<td>T. Hey</td>
			<td>K. Faegri</td>
			<td>G. Rozenberg</td>
			<td>R. Whewell</td>
		</tr>
		
		<tr>
			<td>18:00-18:30</td>
			<td rowspan="2">R. Carbo</td>
			<td>M. Yanez</td>
			<td>W. Herndon</td>
			<td>J. Froelich</td>
		</tr>		

		<tr>
			<td>18:30-19:00</td>
			<td>E. Rossi</td>
			<td>P. Bala</td>
			<td>E. Pauwels</td>
		</tr>

		<tr>
			<td>19:00-19:30</td>
			<td rowspan="3">CHORUS
at the San Francesco
Basilica</td>
			<td>M. Soscun</td>
			<td>F. De Angelis</td>
			<td rowspan="2">Poster Presentation</td>
		</tr>
				
		<tr>
			<td>19:30-20:00</td>
			<td>I. Yavari</td>
			<td>S. Rao</td>
		</tr>		

		<tr>
			<td>20:00-21:00</td>
			<td rowspan="2">Dinner</td>
			<td rowspan="2">Dinner</td>
			<td rowspan="4">Social Dinner</td>
			<td>Dinner</td>
		</tr>		

		<tr>
			<td>21:00-22:00</td>
			<td rowspan="2">Dinner at
San Francesco Convent</td>
			<td>Poster Session A</td>
	
		<tr>
			<td>22:00-23:00</td>
			<td>Free Time</td>
			<td>Free Time</td>
			<td>Poster Session B</td>
		</tr>
					
	</table>
</body>

</html>

e questo e' quello del css:
codice:
<style type="text/css">
	body {
		background-color: gray;
}
	
	h2 {
		text-align: center;
		font-family: verdana;
		color: red;
		}
	p.testo2 {
		font-family: verdana;
		color: green;
		text-align: center;
	}
	p.testo {
		font-family: verdana;
		color: black;
		text-align: center;
	}
	
	p.testo3 {
		font-family: verdana;
		color: magenta;
		text-align: right;
	}
	table.principale {
		border-style: solid;
		border-width: 3px;
		border-color: black;
		text-align: center;
	}
	td {
		padding: 2px;
		border-style: solid;
		border-color: black;
		border-width: 1px;
	}

	tr.primariga {
		background-color: #666666;
		padding: 2px;
		border-style: solid;
		border-color: white;
		border-width: 1px;
		font-weight: bold;
		color: white;
		}
</style>
ho provato anche a mettere nel css a tutti gli elementi tranne il body background-color: trasparent, ma con poco successo..