Merci pour ton aide voici le code total de la page avec ce que tu m'as dit de modifier,j'obtient le message suivant,peut etre le header est il mal placé?
Warning: Cannot modify header information - headers already sent by (output started at c:\program files\easyphp1-8\www\siteperf\doc_siteperf\pollutions2.php:6) in c:\program files\easyphp1-8\www\siteperf\doc_siteperf\pollutions2.php
le code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "
[ Lien ]">
<html xmlns=" [ Lien ]"><!-- InstanceBegin template="/Templates/documents.dwt.php" codeOutsideHTMLIsLocked="false" -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<!-- InstanceBeginEditable name="doctitle" -->
<title>Document sans titre</title>
<?php $self=$_SERVER['PHP_SELF'];?>
<!-- InstanceEndEditable -->
<style type="text/css">
<!--
.Style1 {color: #FFFF00}
.Style2 {
color: #009933;
font-family: Arial, Helvetica, sans-serif;
}
body {
background-color: #009999;
}
#Layer1 { position:absolute;
width:158px;
height:113px;
z-index:1;
left: 29px;
top: 24px;
}
#Layer2 {
position:absolute;
width:140px;
height:105px;
z-index:1;
left: 28px;
top: 24px;
}
.Style4 {
color: #FFFF00;
font-size: 18px;
font-family: Arial, Helvetica, sans-serif;
}
.Style5 {color: #FFFF00; font-family: Arial, Helvetica, sans-serif; }
.Style6 {font-family: Arial, Helvetica, sans-serif}
#Layer3 {
position:absolute;
width:1200px;
height:580px;
z-index:2;
left: 12px;
top: 221px;
}
#Layer4 {
position:absolute;
width:1196px;
height:377px;
z-index:2;
}
#Layer5 {
position:absolute;
width:47px;
height:32px;
z-index:1;
left: 316px;
top: 3px;
}
#Layer6 {
position:absolute;
width:90px;
height:29px;
z-index:2;
left: 455px;
top: 4px;
}
#Layer7 {
position:absolute;
width:151px;
height:29px;
z-index:3;
left: 158px;
top: 3px;
}
#Layer8 {
position:absolute;
width:852px;
height:115px;
z-index:4;
left: 157px;
top: 62px;
}
-->
</style>
<!-- InstanceBeginEditable name="head" --><!-- InstanceEndEditable -->
<script type="text/JavaScript">
<!--
function MM_swapImgRestore() { //v3.0
var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
//-->
</script>
</head>
<body onload="MM_preloadImages('../flash/logoenac.swf')">
<table width="1200" height="223" border="1">
<tr bgcolor="#000000">
<td width="225" rowspan="6"><div id="Layer2"><a href="../index.php" onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('Image1','','../flash/logoenac.swf',1)"></a>
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase=" [ Lien ]" width="201" height="139">
<param name="movie" value="../flash/logoenac.swf" />
<param name="quality" value="high" />
<param name="wmode" value="transparent" />
<embed src="../flash/logoenac.swf" width="201" height="139" quality="high" pluginspage=" [ Lien ]" type="application/x-shockwave-flash" wmode="transparent"></embed>
</object>
</div>
<p>So</p>
<p> </p>
<p> </p>
<p align="center"> </p>
<p align="center"><span class="Style4"><a href="../index.php">SOMMAIRE</a></span></p></td>
<td colspan="6"> </td>
</tr>
<tr bgcolor="#000000">
<td colspan="6"> </td>
</tr>
<tr>
<td width="149" height="34" bgcolor="#000000"><div align="center"><span class="Style5"><a href="../Templates/caracperf.dwt.php" class="Style5">Aérodynamique</a></span></div></td>
<td width="95" bgcolor="#000000"><div align="center"><span class="Style5"><a href="../essaitexte.php">Moteurs</a></span></div></td>
<td width="101" bgcolor="#000000"><div align="center" class="Style1"><a href="../flash/flashsperf.php" class="Style6">Avions</a></div></td>
<td width="139" bgcolor="#000000"><div align="center" class="Style1"><a href="../OPS/opsperf.php" class="Style6">Hélicos</a></div></td>
<td width="208" bgcolor="#000000"><div align="center" class="Style5"><a href="../contact.php">Systèmes</a></div></td>
<td width="237" bgcolor="#000000"><div align="center"><span class="Style5">Turbulence de sillage </span></div></td>
</tr>
<tr>
<td height="39" bgcolor="#000000"><div align="center"><span class="Style5">Conduite du vol </span></div></td>
<td height="39" bgcolor="#000000" class="Style5"><div align="center"><a href="pollutions.php">Pollution</a></div></td>
<td height="39" bgcolor="#000000" class="Style5"><div align="center">Historique</div></td>
<td height="39" bgcolor="#000000"><div align="center" class="Style5">Accidents</div></td>
<td height="39" bgcolor="#000000" class="Style5"><div align="center">Nouveau</div></td>
<td height="39" bgcolor="#000000" class="Style5"><div align="center">Formulaire</div></td>
</tr>
<tr>
<td height="25" bgcolor="#000000" class="Style5"><div align="center">Divers</div></td>
<td height="25" bgcolor="#000000"> </td>
<td height="25" bgcolor="#000000"> </td>
<td height="25" bgcolor="#000000"> </td>
<td height="25" bgcolor="#000000"> </td>
<td height="25" bgcolor="#000000"> </td>
</tr>
<tr>
<td height="63" colspan="6" bgcolor="#000000"><div align="center" class="Style2">DOCUMENTS </div></td>
</tr>
</table>
<form id="form_pollution" name="form_pollution" method="post" action="<?php $self ?>">
</form>
<!-- InstanceBeginEditable name="EditRegion1" -->
<form id="form_pollution" name="form_pollution" method="post" action="<?php $self ?>">
<div id="Layer4">
<div id="Layer5">
<?php
header('Content-type: application/pdf');
header('Content-Disposition: attachment; filename="downloaded.pdf"');
if (!isset($_POST['choix_avion']))$_POST['choix_avion']=0;
$valeur_tex=$_POST['choix_avion'];
switch($valeur_tex)
{case "pdf_avion1": $filename="MecavolPP.pdf";break;
case "pdf_avion2": $filename="Montee.pdf";break;}
readfile($filename);
?>
<label>
<select name="choix_avion" id="choix_avion">
<option value="pdf_avion1">avion1</option>
<option value="pdf_avion2">avion2</option>
</select>
</label>
</div>
<div id="Layer6">
<label>
<input type="submit" name="Submit" value="Sélectionner" />
</label>
</div>
<div id="Layer7">
<label>
<input name="textfield" type="text" value="Docs pdf" />
</label>
</div>
</div>
</form>
EditRegion1<!-- InstanceEndEditable -->
</body>
<!-- InstanceEnd --></html>