Comment enreg. plusieurs lignes dans Textarea

echo nl2br($variable)

<SCRIPT LANGUAGE="Javascript" type="text/javascript">  
String.prototype.trim = function() {  
 return this.replace(/^\s+|\s+$/g,"");  
}  

function resetForm(form) {  
    form.url.value = "";  
    form.robots[0].checked = true;  
    form.file1.value = "";  
    form.file1.disabled = false;  
    form.file2.value = "";  
    form.file2.disabled = false;  
    form.file3.value = "";  
    form.file3.disabled = false;  
}  

function inputFiles(form, value){  
  if(value == 0){  
     form.file1.value = "";  
     form.file1.disabled = true;  
     form.file2.value = "";  
     form.file2.disabled = true;  
     form.file3.value = "";  
     form.file3.disabled = true;  
  }  
  else{  
   form.file1.disabled = false;  
   form.file2.disabled = false;  
   form.file3.disabled = false;  
  }  
}  

function generateRobotsTxt(form){  
 var file1 = '';  
 var file2 = '';  
 var file3 = '';  
    
 form.robotstxt.value = '';  
   
  if (form.url.value != "") {  
    form.robotstxt.value += "# Fichiers robots.txt générer pour " + form.url.value + "\n";  
    form.robotstxt.value += "# Générer par qi98.free.fr - visitez son site d'autres options\n";  
    form.robotstxt.value += "User-agent: *\n";  
      
    if(form.robots[0].checked) {  
   file1 = form.file1.value.trim();       
   file2 = form.file2.value.trim();       
   file3 = form.file3.value.trim();   
         
     if(file1 != "") {  
      if(file1.charAt(0) != '/') file1 = '/' + file1;  
      form.robotstxt.value += "Disallow: " + file1 + "\n";  
     }  
     if(file2 != "") {  
      if(file2.charAt(0) != '/') file2 = '/' + file2;  
      form.robotstxt.value += "Disallow: " + file2 + "\n";  
     }  
     if(file3 != "") {  
      if(file3.charAt(0) != '/') file3 = '/' + file3;  
      form.robotstxt.value += "Disallow: " + file3 + "\n";  
     }  
    }  
    else{  
     form.robotstxt.value += "Disallow: /\n";  
    }  
  }else{  
   resetForm(form);  
  }  
}  
</SCRIPT>   

<form action="avascript:void(0);">   
<table style="border:none;" cellspacing="5">   
 <tr>   
  <td>Adresse du site</td>   
  <td><input type="text" name="url" id="url"></td>   
 </tr>   
 <tr>   
  <td>L'accès des robots est permis</td>   
  <td>  
  <input type="radio" name="robots" id="robots" value="1" checked  onclick = "inputFiles(this.form, 1);"> L'accès de tout robot est permis<br>  
  <input type="radio" name="robots" id="robots" value="0" onclick = "inputFiles(this.form, 0);"> Accès interdit aux robots (tous les fichiers sont exclus)</td>   
 </tr>   
 <tr>   
  <td>Il faut exclure ce fichier/répertoire de la recherche :</td>   
  <td><input type="text" name="file1" id="file1"></td>   
 </tr>   
 <tr>   
  <td>Il faut exclure ce fichier/répertoire de la recherche :</td>   
  <td><input type="text" name="file2" id="file2"></td>   
 </tr>   
 <tr>   
  <td>Il faut exclure ce fichier/répertoire de la recherche :</td>   
  <td><input type="text" name="file3" id="file3"></td>   
 </tr>   
 <tr>   
  <td colspan="3"style="text-align:center;"><input type="button" name="reset" id="reset" value="Effacer" onclick="resetForm(this.form)"></td>    
<td> </td>  
 </tr>   
 <tr>   
  <td colspan="3" style="text-align:center;"><input type="button" name="generate" id="generate" value="Générer le fichier Robots.txt" onclick="generateRobotsTxt(this.form)"></td>   
<td> </td>  
 </tr>   
 <tr>   
  <td colspan="2" style="text-align:center;">   
   <textarea name="robots_txt" id="robotstxt" rows="5" cols="60"></textarea>   
  </td>   
 </tr>   
 <tr>   
  <td colspan="2" align="center">   
   <input type=button onclick="form.robotstxt.focus();form.robotstxt.select()" value="Sélectionnez le code">   
  </td>   
 </tr>   
 <tr>   
  <td colspan="2">   
   <span class="orange">Note : Copiez le texte et sauvegardez-le dans le fichier robots.txt</span>  
  </td>   
 </tr>   
</table>   
</form>   
</p>