Confirm-Script lässt bei mir Seite neuladen was es nicht soll

<script language="JavaScript" type="text/javascript">  </script> <form name="formular" method="post" onSubmit="return check();" action="?module=community&action=admin&do=edit_usergroup&usergroup_id=2">  <input name="submit" type="submit" class="submit" value="Bearbeiten" /> <input name="delete" type="submit" class="submit" value="Löschen" onclick="conf()" />

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<!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" xml:lang="de" lang="de">
<head>
<title>Titel</title>
</head>
<body>
<script language="JavaScript" type="text/javascript">
<!--
function check()	{
	var fail = 0;
	if (document.formular.usergroup_name.value == "")	{
		alert("Name der Benutzergruppe fehlt");
		fail = 1;
	}
	if (fail == 1)	{
		return false;
	}else{
		return true;
	}
}

function conf() {
	if (confirm("Wirklich löschen??")){
		location.href="?module=community&amp;action=admin&amp;do=edit_usergroup&amp;usergroup_id=2"
	} else {
	}
}
-->
</script>
<br />
<form name="formular" method="post" onSubmit="return check();" action="?module=community&amp;action=admin&amp;do=edit_usergroup&amp;usergroup_id=2">
<table border="1" style="width: 95%;border-collapse: collapse;border-color:#000000;" align="center">
<tr>
  <td class="tdbg" colspan="2"><font color="#FFFFFF"><b>Community - <i>Usergruppe bearbeiten/l&ouml;schen</i></b></font></td>

</tr>
<tr>
  <td width="25%"><b>Name der Benutzergruppe</b></td>
  <td align="left"><input name="usergroup_name" type="input" value="Member" /></td>
</tr>
<tr>
  <td width="25%"><b>Rechte der Benutzergruppe</b></td>
  <td><br />
    <table border="1" style="width: 95%;border-collapse: collapse;border-color:#000000;" align="center">
    <tr>

      <td><input id="right1" name="right1" type="checkbox" value="1" checked="checked"  /><label for="right1">News</label></td>
      <td><input id="right2" name="right2" type="checkbox" value="1"   /><label for="right2">Community</label></td>
      <td><input id="right3" name="right3" type="checkbox" value="1"   /><label for="right3">Guestbook</label></td>
      <td><input id="right4" name="right4" type="checkbox" value="1"   /><label for="right4">Settings</label></td>
    </tr>
    <tr>
      <td><input id="right5" name="right5" type="checkbox" value="1" checked="checked"  /><label for="right5">Article</label></td>

	  <td><input id="right6" name="right6" type="checkbox" value="1"   /><label for="right6">Poll</label></td>
	  <td><input id="right7" name="right7" type="checkbox" value="1"   /><label for="right7">Join Us</label></td>
	  <td><input id="right8" name="right8" type="checkbox" value="1"   /><label for="right8">Fight Us</label></td>
	</tr>
	<tr>
	  <td><input id="right9" name="right9" type="checkbox" value="1"   /><label for="right9">Contact</label></td>
	  <td><input id="right10" name="right10" type="checkbox" value="1"   /><label for="right10">Squads</label></td>

	  <td><input id="right11" name="right11" type="checkbox" value="1"   /><label for="right11">Server</label></td>
	  <td><input id="right12" name="right12" type="checkbox" value="1"   /><label for="right12">Matches</label></td>
	</tr>
	</table><br />
  </td>
</tr>
<tr>
  <td colspan="2" align="center"><input name="submit" type="submit" class="submit" value="Speichern" />&nbsp;<input name="delete" type="submit" class="submit" value="L&ouml;schen" onclick="conf()" /></td>
</tr>

</table>
<br />
<input name="count" value="20" type="hidden" />
</form>
</body>
</html>