Masquer une colonne d'un tableau en php

hello,
pourrais-tu afficher ton code source?

Bonjour
Mon code est le suivant : je veux effectuer l'operation de multiplication de telle façon que l'affichage apparait automatique alors que j'ai l'operateur de multiplication et l'egalité et je cherche à masquer ces deux operateurs(* et =)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1256" />
<link href="stylesheets\calendar.css" type="text/css" rel="stylesheet" />
<script src="scripts\calendar.js"></script>
<title>Document sans titre</title>

<script type="text/javascript">
window.onload = function() {
var formulaire = document.forms[0];
var champ1 = formulaire.elements[4];
var champ2 = formulaire.elements[5];
var champResultat = formulaire.elements[6];
var champResultat1 = formulaire.elements[8];
formulaire.onsubmit = champ1.onkeyup = champ2.onkeyup = function() {
var quantite_remplie = 0, pu_ht = 0;

if(champ1.value.length !== 0)
quantite_remplie = parseFloat(champ1.value);

if(champ2.value.length !== 0)
pu_ht = parseFloat(champ2.value);

ht = quantite_remplie * pu_ht;
ttc = quantite_remplie * pu_ht;
champResultat.value = String(ht);
champResultat1.value = String(ttc);

};

};
</script>
</head>
<body>

<form id="form1" name="form1" method="post" onsubmit="return verification1()" action="insertion_bon_remplir_citerne.php">
<table width="1211" border="0">
<tr>
<td align="center"><span class="Style8">Bon de Reception suite au remplissage de citerne</span></td>
<td align="right"><a href="index.php"><img src="images/quitter.jpg" width="58" height="61" border="0" align="right" /></a></td>
</tr>
</table>
<div align="center">
<fieldset style="width:300px;" >
<table >
<tr>
<td>Citerne</td>
<td><input name="code_citerne" type="text" id="code_citerne" value="<?php echo $_GET['code_citerne'];?>"/></td>
<td><a href="liste_citerne.php?" class="Style7"><input type=image value=submit onclick="this.form.action='liste_citerne.php';this.form.submit ()" src="images/download.bmp" alt="Afficher" width="45" height="45" /></a></td>
</tr></table></fieldset>
</div>
<p> </p>
<div align="center">
<fieldset style="width:350px;">
<table>
<tr>
<td align="left" nowrap="nowrap">Quantité(exis.Avant) : </span></td>
<td ><input name="qte_existante_avant" type="text" id="qte_existante_avant'"size="20" value="<?php echo $_GET['qte_existante_avant'];?>"/></span></td>
</tr>
<tr><td align="left"><span class="Style10">Quantité:</span></td>
<td><input type="text" name="quantite_remplie" value="<?php echo $_GET['quantite_remplie'];?>"/></td></tr>
<tr><td>*</td></tr>
<tr><td align="left"><span class="Style10">PU:</span></td>
<td><input type="text" name="pu_ht" value="<?php echo $_GET['pu_ht'];?>"/></td></tr>
<tr><td>=</td></tr>
<tr><td align="left"><span class="Style10">HT:</span></td>
<td><input type="text" name="ht" value="<?php echo $_GET['ht'];?>"/></td></tr>

<tr>
<td align="left"><span class="Style10">TVA :</span></td>
<td ><input name="tva" type="text" id="tva" size="20" value="<?php echo $_GET['tva'];?>" /></td></tr>
<tr>
<td align="left"><span class="Style10">TTC :</span></td>
<td><input name="ttc" type="text" id="ttc" size="20" value="<?php echo $_GET['ttc'];?>"/></td>
</tr>
</table>
</fieldset>
</div>

</form>

</body>
</html>

Le code de la page est le suivant :je veux masquer les deux operateurs de telle façon que l'operation de multiplication apparait s'effectue automatiquement (sans * et =)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1256" />
<link href="stylesheets\calendar.css" type="text/css" rel="stylesheet" />
<script src="scripts\calendar.js"></script>
<title>Document sans titre</title>

<script type="text/javascript">
window.onload = function() {
var formulaire = document.forms[0];
var champ1 = formulaire.elements[4];
var champ2 = formulaire.elements[5];
var champResultat = formulaire.elements[6];
var champResultat1 = formulaire.elements[8];
formulaire.onsubmit = champ1.onkeyup = champ2.onkeyup = function() {
var quantite_remplie = 0, pu_ht = 0;

if(champ1.value.length !== 0)
quantite_remplie = parseFloat(champ1.value);

if(champ2.value.length !== 0)
pu_ht = parseFloat(champ2.value);

ht = quantite_remplie * pu_ht;
ttc = quantite_remplie * pu_ht;
champResultat.value = String(ht);
champResultat1.value = String(ttc);

};

};
</script>
</head>
<body>

<form id="form1" name="form1" method="post" onsubmit="return verification1()" action="insertion_bon_remplir_citerne.php">
<table width="1211" border="0">
<tr>
<td align="center"><span class="Style8">Bon de Reception suite au remplissage de citerne</span></td>
<td align="right"><a href="index.php"><img src="images/quitter.jpg" width="58" height="61" border="0" align="right" /></a></td>
</tr>
</table>
<div align="center">
<fieldset style="width:300px;" >
<table >
<tr>
<td>Citerne</td>
<td><input name="code_citerne" type="text" id="code_citerne" value="<?php echo $_GET['code_citerne'];?>"/></td>
<td><a href="liste_citerne.php?" class="Style7"><input type=image value=submit onclick="this.form.action='liste_citerne.php';this.form.submit ()" src="images/download.bmp" alt="Afficher" width="45" height="45" /></a></td>
</tr></table></fieldset>
</div>
<p> </p>
<div align="center">
<fieldset style="width:350px;">
<table>
<tr>
<td align="left" nowrap="nowrap">Quantité(exis.Avant) : </span></td>
<td ><input name="qte_existante_avant" type="text" id="qte_existante_avant'"size="20" value="<?php echo $_GET['qte_existante_avant'];?>"/></span></td>
</tr>
<tr><td align="left"><span class="Style10">Quantité:</span></td>
<td><input type="text" name="quantite_remplie" value="<?php echo $_GET['quantite_remplie'];?>"/></td></tr>
<tr><td>*</td></tr>
<tr><td align="left"><span class="Style10">PU:</span></td>
<td><input type="text" name="pu_ht" value="<?php echo $_GET['pu_ht'];?>"/></td></tr>
<tr><td>=</td></tr>
<tr><td align="left"><span class="Style10">HT:</span></td>
<td><input type="text" name="ht" value="<?php echo $_GET['ht'];?>"/></td></tr>

<tr>
<td align="left"><span class="Style10">TVA :</span></td>
<td ><input name="tva" type="text" id="tva" size="20" value="<?php echo $_GET['tva'];?>" /></td></tr>
<tr>
<td align="left"><span class="Style10">TTC :</span></td>
<td><input name="ttc" type="text" id="ttc" size="20" value="<?php echo $_GET['ttc'];?>"/></td>
</tr>
</table>
</fieldset>
</div>

</form>

</body>
</html>

Bonjour à tous
Meeeeeeeeeeeeerci beaucoup pour vos efforts et patience j'ai résolu le probleme de visibilité des deux colonnes ça y est j'ai trouvé une solution^__^
ci-joint le code complet de ma page

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1256" />
<link href="stylesheets\calendar.css" type="text/css" rel="stylesheet" />
<script src="scripts\calendar.js"></script>
<title>Document sans titre</title>

<script type="text/javascript">
window.onload = function() {
var formulaire = document.forms[0];
var champ1 = formulaire.elements[4];
var champ2 = formulaire.elements[5];
var champResultat = formulaire.elements[6];
var champResultat1 = formulaire.elements[8];
formulaire.onsubmit = champ1.onkeyup = champ2.onkeyup = function() {
var quantite_remplie = 0, pu_ht = 0;

if(champ1.value.length !== 0)
quantite_remplie = parseFloat(champ1.value);

if(champ2.value.length !== 0)
pu_ht = parseFloat(champ2.value);

ht = quantite_remplie * pu_ht;
ttc = quantite_remplie * pu_ht;
champResultat.value = String(ht);
champResultat1.value = String(ttc);

};

};
</script>
</head>
<body>

<form id="form1" name="form1" method="post" onsubmit="return verification1()" action="insertion_bon_remplir_citerne.php">
<table width="1211" border="0">
<tr>
<td align="center"><span class="Style8">Bon de Reception suite au remplissage de citerne</span></td>
<td align="right"><a href="index.php"><img src="images/quitter.jpg" width="58" height="61" border="0" align="right" /></a></td>
</tr>
</table>
<div align="center">
<fieldset style="width:300px;" >
<table >
<tr>
<td>Citerne</td>
<td><input name="code_citerne" type="text" id="code_citerne" value="<?php echo $_GET['code_citerne'];?>"/></td>
<td><a href="liste_citerne.php?" class="Style7"><input type=image value=submit onclick="this.form.action='liste_citerne.php';this.form.submit ()" src="images/download.bmp" alt="Afficher" width="45" height="45" /></a></td>
</tr></table></fieldset>
</div>
<p> </p>
<div align="center">
<fieldset style="width:350px;">
<table>
<tr>
<td align="left" nowrap="nowrap">Quantité(exis.Avant) : </span></td>
<td ><input name="qte_existante_avant" type="text" id="qte_existante_avant'"size="20" value="<?php echo $_GET['qte_existante_avant'];?>"/></span></td>
</tr>
<tr><td align="left"><span class="Style10">Quantité:</span></td>
<td><input type="text" name="quantite_remplie" value="<?php echo $_GET['quantite_remplie'];?>"/></td></tr>
<tr><td style="display:none">*</td></tr>
<tr><td align="left"><span class="Style10">PU:</span></td>
<td><input type="text" name="pu_ht" value="<?php echo $_GET['pu_ht'];?>"/></td></tr>
<tr><td style="display:none">=</td></tr>
<tr><td align="left"><span class="Style10">HT:</span></td>
<td><input type="text" name="ht" value="<?php echo $_GET['ht'];?>"/></td></tr>

<tr>
<td align="left"><span class="Style10">TVA :</span></td>
<td ><input name="tva" type="text" id="tva" size="20" value="<?php echo $_GET['tva'];?>" /></td></tr>
<tr>
<td align="left"><span class="Style10">TTC :</span></td>
<td><input name="ttc" type="text" id="ttc" size="20" value="<?php echo $_GET['ttc'];?>"/></td>
</tr>
</table>
</fieldset>
</div>

</form>

</body>
</html>