<?php
/* For licensing terms, see /license.txt */
/**
*	@package chamilo.admin
*/

// name of the language file that needs to be included
$language_file = array('admin','registration','userInfo');

// resetting the course id
$cidReset = true;

// including some necessary files
require_once '../inc/global.inc.php';
require_once '../inc/lib/xajax/xajax.inc.php';
require_once '../inc/lib/group_portal_manager.lib.php';

// setting the section (for the tabs)
$this_section = SECTION_PLATFORM_ADMIN;

// Access restrictions
api_protect_admin_script(true);

// setting breadcrumbs
$interbreadcrumb[] = array('url' => 'index.php','name' => get_lang('PlatformAdmin'));
$interbreadcrumb[] = array('url' => 'group_list.php','name' => get_lang('GroupList'));

// Database Table Definitions
$tbl_group			= Database::get_main_table(TABLE_MAIN_GROUP);
$tbl_user			= Database::get_main_table(TABLE_MAIN_USER);
$tbl_group_rel_user	= Database::get_main_table(TABLE_MAIN_USER_REL_GROUP);
$tbl_user_rel_access_url= Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
$needle = null;
$user_anonymous = api_get_anonymous_id();

// setting the name of the tool
$tool_name = get_lang('SubscribeUsersToGroup');
$group_id = intval($_GET['id']);
$without_user_id = null;

$add_type = 'multiple';
if (isset($_REQUEST['add_type']) && $_REQUEST['add_type'] != '') {
    $add_type = Security::remove_XSS($_REQUEST['add_type']);
}

//checking for extra field with filter on
$xajax = new xajax();
$xajax->registerFunction('search_users');
function search_users($needle, $type, $relation_type)
{
    global $tbl_user, $tbl_user_rel_access_url, $tbl_group_rel_user, $group_id;
    $xajax_response = new XajaxResponse();
    $return = $return_origin = $return_destination = '';
    $without_user_id = $without_user_id = $condition_relation = '';

    if (!empty($group_id) && !empty($relation_type)) {
        $group_id = intval($group_id);
        $relation_type = intval($relation_type);
        // get user_id from relation type and group id
        $sql = "SELECT user_id FROM $tbl_group_rel_user
                WHERE group_id = '$group_id'
                AND relation_type IN (".GROUP_USER_PERMISSION_ADMIN.",".GROUP_USER_PERMISSION_READER.",".GROUP_USER_PERMISSION_PENDING_INVITATION.",".GROUP_USER_PERMISSION_MODERATOR.", ".GROUP_USER_PERMISSION_HRM.") ";
        $res = Database::query($sql);
        $user_ids = array();
        if (Database::num_rows($res) > 0) {
            while ($row = Database::fetch_row($res)) {
                $user_ids[] = $row[0];
            }
            $without_user_id = " AND user.user_id NOT IN(".implode(',', $user_ids).") ";
        }

        $condition_relation = " AND groups.relation_type = '$relation_type' ";

        // data for destination user list
        $sql = "SELECT user.user_id, user.username, user.lastname, user.firstname
                FROM $tbl_group_rel_user groups
                INNER JOIN  $tbl_user user ON user.user_id = groups.user_id
                WHERE groups.group_id = '$group_id' $condition_relation ";

        $rs_destination = Database::query($sql);
        if (Database::num_rows($rs_destination) > 0) {
            $return_destination .= '<select id="destination_users" name="sessionUsersList[]" multiple="multiple" size="15" style="width:360px;">';
            while ($row = Database::fetch_array($rs_destination)) {
                $person_name = api_get_person_name($row['firstname'], $row['lastname']);
                $return_destination .= '<option value="'.$row['user_id'].'">'.
                    $person_name.' ('.$row['username'].')</option>';
            }
            $return_destination .= '</select>';
        } else {
            $return_destination .= '<select id="destination_users" name="sessionUsersList[]" multiple="multiple" size="15" style="width:360px;"></select>';
        }
        $xajax_response->addAssign('ajax_destination_list','innerHTML', api_utf8_encode($return_destination));
    } else {
        $return_destination .= '<select id="destination_users" name="sessionUsersList[]" multiple="multiple" size="15" style="width:360px;"></select>';
        $xajax_response->addAssign('ajax_destination_list','innerHTML', api_utf8_encode($return_destination));

        if ($type == 'single') {
            $return.= '';
            $xajax_response->addAssign('ajax_list_users_single','innerHTML',api_utf8_encode($return));
        } else {
            $return_origin .= '<select id="origin_users" name="nosessionUsersList[]" multiple="multiple" size="15" style="width:360px;"></select>';
            $xajax_response->addAssign('ajax_origin_list_multiple', 'innerHTML', api_utf8_encode($return_origin));
        }
    }

    if (!empty($needle) && !empty($type)) {

        // xajax send utf8 datas... datas in db can be non-utf8 datas
        $charset = api_get_system_encoding();
        $needle = Database::escape_string($needle);
        $needle = api_convert_encoding($needle, $charset, 'utf-8');
        $user_anonymous = api_get_anonymous_id();
        $order_clause = api_sort_by_first_name() ? ' ORDER BY firstname, lastname, username' : ' ORDER BY lastname, firstname, username';
        if ($type == 'single') {
            if (!empty($group_id) && !empty($relation_type)) {
                // search users where username or firstname or lastname begins likes $needle
                $sql = "SELECT user_id, username, lastname, firstname
                        FROM $tbl_user user
                        WHERE (username LIKE '$needle%' OR firstname LIKE '$needle%' OR lastname LIKE '$needle%')
                        AND user_id<>'$user_anonymous' $without_user_id $order_clause LIMIT 11";
                if (api_is_multiple_url_enabled()) {
                    $access_url_id = api_get_current_access_url_id();
                    if ($access_url_id != -1) {
                        $sql = "SELECT user.user_id, username, lastname, firstname FROM $tbl_user user
                                INNER JOIN $tbl_user_rel_access_url url_user ON (url_user.user_id=user.user_id)
                                WHERE access_url_id = '$access_url_id'  AND (username LIKE '$needle%' OR firstname LIKE '$needle%' OR lastname LIKE '$needle%')
                                AND user.user_id<>'$user_anonymous' $without_user_id $order_clause LIMIT 11 ";
                    }
                }
                $rs_single = Database::query($sql);
                $i=0;
                while ($user = Database :: fetch_array($rs_single)) {
                    $i++;
                    if ($i<=10) {
                        $person_name = api_get_person_name($user['firstname'], $user['lastname']);
                        $return .= '<a href="javascript: void(0);" onclick="javascript: add_user(\''.$user['user_id'].'\',\''.$person_name.' ('.$user['username'].')'.'\')">'.$person_name.' ('.$user['username'].')</a><br />';
                    } else {
                        $return .= '...<br />';
                    }
                }
                $xajax_response->addAssign('ajax_list_users_single','innerHTML',api_utf8_encode($return));
            } else {
                $xajax_response->addAlert(get_lang('YouMustChooseARelationType'));
                $xajax_response->addClear('user_to_add', 'value');
            }

        } else {
            // multiple
            if (!empty($group_id) && !empty($relation_type)) {
                $sql = "SELECT user_id, username, lastname, firstname FROM $tbl_user user
                        WHERE ".(api_sort_by_first_name() ? 'firstname' : 'lastname')." LIKE '$needle%' AND user_id<>'$user_anonymous' $without_user_id $order_clause ";
                if (api_is_multiple_url_enabled()) {
                    $access_url_id = api_get_current_access_url_id();
                    if ($access_url_id != -1) {
                        $sql = "SELECT user.user_id, username, lastname, firstname
                                FROM $tbl_user user
                                INNER JOIN $tbl_user_rel_access_url url_user ON (url_user.user_id=user.user_id)
                                WHERE
                                    access_url_id = '$access_url_id' AND
                                    ".(api_sort_by_first_name() ? 'firstname' : 'lastname')." LIKE '$needle%' AND
                                    user.user_id<>'$user_anonymous' $without_user_id $order_clause ";
                    }
                }

                $rs_multiple = Database::query($sql);
                $return_origin .= '<select id="origin_users" name="nosessionUsersList[]" multiple="multiple" size="15" style="width:360px;">';
                while ($user = Database :: fetch_array($rs_multiple)) {
                    $person_name = api_get_person_name($user['firstname'], $user['lastname']);
                    $return_origin .= '<option value="'.$user['user_id'].'">'.
                        $person_name.' ('.$user['username'].')</option>';
                }
                $return_origin .= '</select>';
                $xajax_response->addAssign('ajax_origin_list_multiple', 'innerHTML', api_utf8_encode($return_origin));
            }
        }
    }
    return $xajax_response;
}

$xajax->processRequests();
$htmlHeadXtra[] = $xajax->getJavascript('../inc/lib/xajax/');
$htmlHeadXtra[] = '
<script>
function add_user (code, content) {

	// document.getElementById("user_to_add").value = "";
	//document.getElementById("ajax_list_users_single").innerHTML = "";

	destination = document.getElementById("destination_users");
	for (i=0;i<destination.length;i++) {
		if (destination.options[i].text == content) {
            return false;
		}
	}

	destination.options[destination.length] = new Option(content,code);
	destination.selectedIndex = -1;
	sortOptions(destination.options);
}

function remove_item(origin)
{
	for(var i = 0 ; i<origin.options.length ; i++) {
		if(origin.options[i].selected) {
			origin.options[i]=null;
			i = i-1;
		}
	}
}

function validate_filter() {
    document.formulaire.add_type.value = \''.$add_type.'\';
    document.formulaire.form_sent.value=0;
    document.formulaire.submit();
}
</script>';

$form_sent = 0;
$errorMsg = $firstLetterUser = $firstLetterSession='';
$UserList = $SessionList = array();
$users = $sessions = array();
$noPHP_SELF = true;
$group_info = GroupPortalManager::get_group_data($group_id);
$group_name = $group_info['name'];

Display::display_header($group_name);

if (isset($_POST['form_sent']) && $_POST['form_sent']) {
    $form_sent			= $_POST['form_sent'];
    $firstLetterUser	= isset($_POST['firstLetterUser']) ? $_POST['firstLetterUser'] : null;
    $UserList			= $_POST['sessionUsersList'];
    $group_id			= intval($_POST['id']);
    $relation_type		= intval($_POST['relation']);

    if (!is_array($UserList)) {
        $UserList = array();
    }

    if ($form_sent == 1) {
        $users_by_group = GroupPortalManager::get_users_by_group($group_id, null, array($relation_type));
        $user_id_relation    = array_keys($users_by_group);
        $user_relation_diff  = array_diff($user_id_relation, $UserList);
        if (!empty($user_relation_diff)) {
            foreach ($user_relation_diff as $user_id) {
                GroupPortalManager::delete_user_rel_group($user_id, $group_id);
            }
        }
        $result = GroupPortalManager::add_users_to_groups($UserList, array($group_id), $relation_type);
        Display :: display_confirmation_message(get_lang('UsersEdited'));
    }
}

$nosessionUsersList = $sessionUsersList = array();
$ajax_search = $add_type == 'unique' ? true : false;

$order_clause = api_sort_by_first_name() ? ' ORDER BY firstname, lastname, username' : ' ORDER BY lastname, firstname, username';

if ($ajax_search) {

    // data for destination list
    if (isset($_POST['id']) && isset($_POST['relation'])) {
        // data for destination user list
        $id = intval($_POST['id']);
        $relation_type = intval($_POST['relation']);
        $condition_relation = " AND groups.relation_type = '$relation_type' ";
        $sql = "SELECT user.user_id, user.username, user.lastname, user.firstname
                FROM $tbl_group_rel_user groups
                INNER JOIN  $tbl_user user ON user.user_id = groups.user_id
                WHERE groups.group_id = '$id' $condition_relation ";
        $rs_destination = Database::query($sql);
        if (Database::num_rows($rs_destination) > 0) {
            while ($row_destination_list = Database::fetch_array($rs_destination)) {
                $sessionUsersList[$row_destination_list['user_id']] = $row_destination_list ;
            }
        }
    }
} else {

    $many_users = false;
    $sql = "SELECT count(user_id) FROM $tbl_user user
            WHERE ".(api_sort_by_first_name() ? 'firstname' : 'lastname')." LIKE '$needle%' AND
            user_id<>'$user_anonymous' $without_user_id ";

    if (api_is_multiple_url_enabled()) {
        $access_url_id = api_get_current_access_url_id();
        if ($access_url_id != -1) {
            $sql = "SELECT count(user.user_id) FROM $tbl_user user
                    INNER JOIN $tbl_user_rel_access_url url_user ON (url_user.user_id=user.user_id)
                    WHERE
                        access_url_id = '$access_url_id' AND
                        ".(api_sort_by_first_name() ? 'firstname' : 'lastname')." LIKE '$needle%' AND
                        user.user_id<>'$user_anonymous' $without_user_id ";
        }
    }
    $rs_count  = Database::query($sql);
    $row_count = 0;
    if (Database::num_rows($rs_count)) {
        $row_count = Database::fetch_row($rs_count);
        $row_count = $row_count[0];
    }

    if ($row_count > 2) {
        $many_users = true;
    }

    // data for origin list
    if (isset($_GET['id'])) {
        $id = intval($_GET['id']);
        $needle = isset($_POST['firstLetterUser']) ? Database::escape_string($_POST['firstLetterUser']) : null;
        $needle = api_convert_encoding($needle, $charset, 'utf-8');
        $user_anonymous = api_get_anonymous_id();
        // get user_id from relation type and group id
        $sql = "SELECT user_id FROM $tbl_group_rel_user
                WHERE group_id = $id
                AND relation_type IN (".GROUP_USER_PERMISSION_ADMIN.", ".GROUP_USER_PERMISSION_READER.",".GROUP_USER_PERMISSION_PENDING_INVITATION.",".GROUP_USER_PERMISSION_MODERATOR.", ".GROUP_USER_PERMISSION_HRM.") ";
        $res = Database::query($sql);
        $user_ids = array();
        if (Database::num_rows($res) > 0) {
            while ($row = Database::fetch_row($res)) {
                $user_ids[] = $row[0];
            }
            $without_user_id = " AND user.user_id NOT IN(".implode(',', $user_ids).") ";
        }

        $sql = "SELECT user_id, username, lastname, firstname FROM $tbl_user user
                WHERE ".(api_sort_by_first_name() ? 'firstname' : 'lastname')." LIKE '$needle%' AND user_id<>'$user_anonymous' $without_user_id $order_clause ";
        if (api_is_multiple_url_enabled()) {
            $access_url_id = api_get_current_access_url_id();
            if ($access_url_id != -1) {
                $sql = "SELECT user.user_id, username, lastname, firstname FROM $tbl_user user
                        INNER JOIN $tbl_user_rel_access_url url_user ON (url_user.user_id=user.user_id)
                        WHERE access_url_id = '$access_url_id'
                        AND ".(api_sort_by_first_name() ? 'firstname' : 'lastname')." LIKE '$needle%'
                        AND user.user_id<>'$user_anonymous' $without_user_id $order_clause ";
            }
        }
        $rs_origin_list = Database::query($sql);
        while ($row_origin_list = Database::fetch_array($rs_origin_list)) {
            $nosessionUsersList[$row_origin_list['user_id']] = $row_origin_list;
        }
    }

    // data for destination list
    if (isset($_POST['id']) && isset($_POST['relation'])) {
        // data for destination user list
        $id = intval($_POST['id']);
        $relation_type = intval($_POST['relation']);
        $condition_relation = " AND groups.relation_type = '$relation_type' ";

        $sql = "SELECT user.user_id, user.username, user.lastname, user.firstname
                FROM $tbl_group_rel_user groups
                INNER JOIN  $tbl_user user ON user.user_id = groups.user_id
                WHERE groups.group_id = '$id' $condition_relation ";
        $rs_destination = Database::query($sql);
        if (Database::num_rows($rs_destination) > 0) {
            while ($row_destination_list = Database::fetch_array($rs_destination)) {
                $sessionUsersList[$row_destination_list['user_id']] = $row_destination_list ;
            }
        }
    }
}

if ($add_type == 'multiple') {
    $link_add_type_unique = '<a href="'.api_get_self().'?id='.$group_id.'&add_type=unique">'.Display::return_icon('single.gif').get_lang('SessionAddTypeUnique').'</a>';
    $link_add_type_multiple = Display::return_icon('multiple.gif').get_lang('SessionAddTypeMultiple');
} else {
    $link_add_type_unique = Display::return_icon('single.gif').get_lang('SessionAddTypeUnique');
    $link_add_type_multiple = '<a href="'.api_get_self().'?id='.$group_id.'&add_type=multiple">'.Display::return_icon('multiple.gif').get_lang('SessionAddTypeMultiple').'</a>';
}
?>

<div class="actions">
	<?php echo $link_add_type_unique ?>&nbsp;|&nbsp;<?php echo $link_add_type_multiple ?>
</div>

<form name="formulaire" method="post" action="<?php echo api_get_self(); ?>?id=<?php echo $group_id; ?>" style="margin:0px;" <?php if($ajax_search){echo ' onsubmit="valide();"';}?>>
<?php echo '<legend>'.$tool_name.' ('.$group_info['name'].')</legend>'; ?>
<?php if ($add_type=='multiple') { ?>
<select name="relation" id="relation" onchange="xajax_search_users(document.getElementById('firstLetterUser').value,'multiple',this.value)">
<?php } else { ?>
<select name="relation" id="relation" onchange="xajax_search_users(document.getElementById('user_to_add').value,'single',this.value);">
<?php } ?>
<option value=""><?php echo get_lang('SelectARelationType')?></option>
<option value="<?php echo GROUP_USER_PERMISSION_ADMIN ?>" <?php echo ((isset($_POST['relation']) && $_POST['relation']==GROUP_USER_PERMISSION_ADMIN)?'selected=selected':'') ?> > <?php echo get_lang('Admin') ?></option>
<option value="<?php echo GROUP_USER_PERMISSION_READER ?>" <?php echo ((isset($_POST['relation']) && $_POST['relation']==GROUP_USER_PERMISSION_READER)?'selected=selected':'') ?> > <?php echo get_lang('Reader') ?></option>
<option value="<?php echo GROUP_USER_PERMISSION_PENDING_INVITATION ?>" <?php echo ((isset($_POST['relation']) && $_POST['relation']==GROUP_USER_PERMISSION_PENDING_INVITATION)?'selected=selected':'') ?> > <?php echo get_lang('PendingInvitation') ?></option>
<option value="<?php echo GROUP_USER_PERMISSION_MODERATOR ?>" <?php echo ((isset($_POST['relation']) && $_POST['relation']==GROUP_USER_PERMISSION_MODERATOR)?'selected=selected':'') ?> > <?php echo get_lang('Moderator') ?></option>
<option value="<?php echo GROUP_USER_PERMISSION_HRM ?>" <?php echo ((isset($_POST['relation']) && $_POST['relation']==GROUP_USER_PERMISSION_HRM)?'selected=selected':'') ?> > <?php echo get_lang('Drh') ?></option>
</select>
<input type="hidden" name="form_sent" value="1" />
<input type="hidden" name="id" value="<?php echo $group_id ?>" />
<input type="hidden" name="add_type" value="<?php echo $add_type ?>" />

<?php
if (!empty($errorMsg)) {
    Display::display_normal_message($errorMsg);
}
?>

<table border="0" cellpadding="5" cellspacing="0" width="100%">
<tr>
  <td align="center"><b><?php echo get_lang('UserListInPlatform') ?> :</b>
  </td>
  <td>&nbsp;</td>
  <td align="center"><b><?php echo get_lang('UsersInGroup') ?> :</b></td>
</tr>
<?php if ($add_type=='multiple') { ?>
<tr>
<td align="center">
<?php echo get_lang('FirstLetterUser'); ?> :
	<div id="firstLetter">
        <select name="firstLetterUser" id="firstLetterUser" onchange = "xajax_search_users(this.value,'multiple',document.getElementById('relation').value)" >
            <option value = "%"><?php echo get_lang('All') ?></option>
              <?php
                $selected_letter = isset($_POST['firstLetterUser']) ? $_POST['firstLetterUser'] : null;
                echo Display :: get_alphabet_options($selected_letter);
              ?>
	     </select>
    </div>
</td>
<td align="center">&nbsp;</td>
</tr>
<?php } ?>
<tr>
  <td align="center">
  <div id="content_source">
  	  <?php
  	  if (!($add_type=='multiple')) {
  	  	?>
		<input type="text" id="user_to_add" onkeyup="xajax_search_users(this.value,'single',document.getElementById('relation').value)" />
		<div id="ajax_list_users_single"></div>
		<?php
  	  } else {
  	  ?>
  	  <div id="ajax_origin_list_multiple">
	  <select id="origin_users" name="nosessionUsersList[]" multiple="multiple" size="15" style="width:360px;">
		<?php
		if (!empty($nosessionUsersList)) {
			foreach($nosessionUsersList as $enreg) {
			?>
				<option value="<?php echo $enreg['user_id']; ?>"  > <?php echo $enreg['firstname'].' '.$enreg['lastname'].' ('.$enreg['username'].')'; ?></option>
			<?php
			}
		}
		?>
	  </select>
	  </div>
	<?php
  	  }
  	  unset($nosessionUsersList);
  	 ?>
  </div>
  </td>
  <td width="10%" valign="middle" align="center">
  <?php
  if ($ajax_search) {
  ?>
    <button class="arrowl" type="button" onclick="remove_item(document.getElementById('destination_users'))" ></button>
  <?php
  } else {
  ?>
  	<button class="arrowr" type="button" onclick="moveItem(document.getElementById('origin_users'), document.getElementById('destination_users'))" onclick="moveItem(document.getElementById('origin_users'), document.getElementById('destination_users'))"></button>
	<br /><br />
	<button class="arrowl" type="button" onclick="moveItem(document.getElementById('destination_users'), document.getElementById('origin_users'))" onclick="moveItem(document.getElementById('destination_users'), document.getElementById('origin_users'))"></button>
	<?php
  }
  ?>
	<br /><br /><br /><br /><br />
  </td>
  <td align="center">
  <div id="ajax_destination_list">
  <select id="destination_users" name="sessionUsersList[]" multiple="multiple" size="15" style="width:360px;">
	<?php
	if (!empty($sessionUsersList)) {
		foreach($sessionUsersList as $enreg) { ?>
			<option value="<?php echo $enreg['user_id']; ?>">
                <?php echo $enreg['firstname'].' '.$enreg['lastname'].' ('.$enreg['username'].')'; ?>
            </option>
	<?php }
	} unset($sessionUsersList);
    ?>
  </select>
  </div>
  </td>
</tr>
<tr>
	<td colspan="3" align="center">
		<br />
		<?php
		echo '<button class="save" type="button" value="" onclick="valide()" >'.get_lang('SubscribeUsersToGroup').'</button>';
		?>
	</td>
</tr>
</table>
</form>

<script>
function moveItem(origin , destination) {
	for (var i = 0 ; i<origin.options.length ; i++) {
		if (origin.options[i].selected) {
			destination.options[destination.length] = new Option(origin.options[i].text,origin.options[i].value);
			origin.options[i]=null;
			i = i-1;
		}
	}
	destination.selectedIndex = -1;
	sortOptions(destination.options);

}

function sortOptions(options) {
	newOptions = new Array();
	for (i = 0 ; i<options.length ; i++)
		newOptions[i] = options[i];

	newOptions = newOptions.sort(mysort);
	options.length = 0;
	for(i = 0 ; i < newOptions.length ; i++)
		options[i] = newOptions[i];

}

function mysort(a, b) {
	if (a.text.toLowerCase() > b.text.toLowerCase()){
		return 1;
	}
	if (a.text.toLowerCase() < b.text.toLowerCase()){
		return -1;
	}
	return 0;
}

function valide() {
	var relation_select = document.getElementById('relation');
	if (relation_select && relation_select.value=="") {
		alert("<?php echo get_lang('YouMustChooseARelationType')?>");
		return false;
	} else {
		var options = document.getElementById('destination_users').options;
		for (i = 0 ; i<options.length ; i++)
			options[i].selected = true;
		document.forms.formulaire.submit();
	}
}

function loadUsersInSelect(select) {
	var xhr_object = null;

	if (window.XMLHttpRequest) // Firefox
		xhr_object = new XMLHttpRequest();
	else if(window.ActiveXObject) // Internet Explorer
		xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	else  // XMLHttpRequest non supporté par le navigateur
	alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");

	xhr_object.open("POST", "loadUsersInSelect.ajax.php");
	xhr_object.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

	nosessionUsers = makepost(document.getElementById('origin_users'));
	sessionUsers = makepost(document.getElementById('destination_users'));
	nosessionClasses = makepost(document.getElementById('origin_classes'));
	sessionClasses = makepost(document.getElementById('destination_classes'));
	xhr_object.send("nosessionusers="+nosessionUsers+"&sessionusers="+sessionUsers+"&nosessionclasses="+nosessionClasses+"&sessionclasses="+sessionClasses);

	xhr_object.onreadystatechange = function() {
		if(xhr_object.readyState == 4) {
			document.getElementById('content_source').innerHTML = result = xhr_object.responseText;
			//alert(xhr_object.responseText);
		}
	}
}

function makepost(select) {
	var options = select.options;
	var ret = "";
	for (i = 0 ; i<options.length ; i++)
		ret = ret + options[i].value +'::'+options[i].text+";;";
	return ret;
}
</script>
<?php

Display::display_footer();
