Sourcecode von geldzurueck.php
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Geld her</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link href="../pcc.css" rel="stylesheet" type="text/css">
</head>
<body bgcolor="#666666" text="#CCCCCC">
<div align="center"><span class="titel"> Kassa </span> </div>
<form name="form1" method="post" action="geldzurueck.php">
<table width="75%" height="296" align="center" cellspacing="3" class="textkursiv">
<tr> 
<td width="50%" class="textfettkursiv"> <div align="right">Betrag:</div></td>
<td width="49%"> 
<?php
  if(isset($_POST['Submit']))
  {
  $betrag=$_POST['txt_betrag'];
  $gegeben=$_POST['txt_gegeben'];
  $retour=$gegeben-$betrag;
  
  echo '<input name="txt_betrag" type="text" id="txt_betrag2" ';
  echo "value=$betrag>";
  }
  else
  {
  echo '<input name="txt_betrag" type="text" id="txt_betrag2"> ';
  $retour=0;
  $gegeben=0;
  }
  ?>
<div align="left"></div></td>
</tr>
<tr> 
<td width="50%" class="textfettkursiv"> <div align="right">Gegeben:</div></td>
<td> 
<?php
echo '<input name="txt_gegeben" type="text" id="txt_gegeben2" ';
echo "value=$gegeben>";
?>
<div align="left"></div></td>
</tr>
<tr> 
<td width="50%" class="textfettkursiv"> <div align="right">Retour:</div></td>
<td> 
<?php 
echo '<input name="txt_retour" type="text" id="txt_retour"';
echo  "value=$retour>";
?>
<div align="left"></div></td>
</tr>
<tr> 
<td width="50%" height="63" class="textfettkursiv"> <div
  align="right"> 
<input type="reset" name="Submit2" value="Reset">
</div></td>
<td> <div align="left"> 
<input type="submit" name="Submit" value="ENTER">
</div></td>
</tr>
<tr> 
<td height="49" class="textfettkursiv"> <div align="right"> 
<?php
while($retour>=500)
  {
  echo '<img src="geld/500.jpg" width="101" height="54">';
  $retour=$retour-500;
  }
  ?>
</div></td>
<td height="49" class="textfettkursiv"> 
<?php
while($retour>=200)
  {
  echo '<img src="geld/200.jpg" width="101" height="54">';
  $retour=$retour-200;
  }
  ?>
</td>
</tr>
<tr> 
<td height="49" class="textfettkursiv"> <div align="right"> 
<?php
while($retour>=100)
  {
  echo '<img src="geld/100.jpg" width="101" height="54">';
  $retour=$retour-100;
  }
  ?>
</div></td>
<td height="49" class="textfettkursiv"> 
<?php
while($retour>=50)
  {
  echo '<img src="geld/50.jpg" width="101" height="54">';
  $retour=$retour-50;
  }
  ?>
</td>
</tr>
<tr> 
<td height="49" class="textfettkursiv"> <div align="right"> 
<?php
while($retour>=20)
  {
  echo '<img src="geld/20.jpg" width="101" height="54">';
  $retour=$retour-20;
  }
  ?>
</div></td>
<td height="49" class="textfettkursiv"> 
<?php
while($retour>=10)
  {
  echo '<img src="geld/10.jpg" width="101" height="54">';
  $retour=$retour-10;
  }
  ?>
</td>
</tr>
<tr> 
<td width="50%" height="49" class="textfettkursiv"> <div
  align="right"> 
<?php
while($retour>=5)
  {
  echo '<img src="geld/5.jpg" width="101" height="55">';
  $retour=$retour-5;
  }
  ?>
</div></td>
<td height="49" class="textfettkursiv"> 
<?php
while($retour>=2)
  {
  echo '<img src="geld/2.jpg">';
  $retour=$retour-2;
  }
  ?>
</td>
</tr>
<tr> 
<td height="49" class="textfettkursiv"> <div align="right"> 
<?php
while($retour>=1)
  {
  echo '<img src="geld/1.jpg">';
  $retour--;
  }
  ?>
</div></td>
<td height="49" class="textfettkursiv"> 
<?php
while($retour>=0.5)
  {
  echo '<img src="geld/50c.jpg">';
  $retour=$retour-0.5;
  }
  ?>
</td>
</tr>
<tr> 
<td height="49" class="textfettkursiv">
<div align="right"> 
<?php
while($retour>=0.2)
  {
  echo '<img src="geld/20c.jpg">';
  $retour=$retour-0.2;
  }
  ?>
</div></td>
<td height="49" class="textfettkursiv">
<?php
while($retour>=0.1)
  {
  echo '<img src="geld/10c.jpg">';
  $retour=$retour-0.1;
  }
  ?></td>
</tr>
<tr> 
<td height="49" class="textfettkursiv">
<div align="right">
<?php
while($retour>=0.05)
  {
  echo '<img src="geld/5c.jpg">';
  $retour=$retour-0.05;
  }
  ?>
</div>
</td>
<td height="49" class="textfettkursiv">
<?php
while($retour>=0.02)
  {
  echo '<img src="geld/2c.jpg">';
  $retour=$retour-0.02;
  }
  ?>
</td>
</tr>
<tr> 
<td width="50%" height="49" class="textfettkursiv">
<div align="right">
<?php
  $retour=round($retour,2);
  if($retour>0)
  {
  echo '<img src="geld/1c.jpg">';
  }
  ?> 
</div></td>
<td height="49" class="textfettkursiv"> </td>
</tr>
</table>
</form>
<p> </p>
</body>
</html>