diff --git a/application/controllers/system/Variables.php b/application/controllers/system/Variables.php
new file mode 100644
index 000000000..20303118b
--- /dev/null
+++ b/application/controllers/system/Variables.php
@@ -0,0 +1,78 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Class Variables
+ * Provides interface for managing user variables.
+ */
+class Variables extends Auth_Controller
+{
+	private $_uid;
+
+	/**
+	 * Variables constructor.
+	 * Sets logged in user, loads models and libraries.
+	 */
+	public function __construct()
+	{
+		parent::__construct(
+			array(
+				'setVar' => 'basis/variable:rw',
+				'getVar' => 'basis/variable:rw',
+				'changeStudiensemesterVar' => 'basis/variable:rw'
+			)
+		);
+
+		$this->load->model('system/variable_model', 'VariableModel');
+
+		$this->_setAuthUID();
+
+		$this->load->library('VariableLib', array('uid' => $this->_uid));
+	}
+
+	/**
+	 * Sets a user variable based on received post parameters, outputs JSON response.
+	 */
+	public function setVar()
+	{
+		$name = $this->input->post('name');
+		$wert = $this->input->post('wert');
+
+		$result = $this->VariableModel->setVariable($this->_uid, $name, $wert);
+
+		$this->outputJson($result);
+	}
+
+	/**
+	 * gets a user variable based on received post parameter, outputs JSON response.
+	 */
+	public function getVar()
+	{
+		$name = $this->input->get('name');
+		$this->outputJson($this->VariableModel->getVariables($this->_uid, array($name)));
+	}
+
+	/**
+	 * Changes a user variable containing a Studiensemester based on received post parameters, outputs JSON response.
+	 */
+	public function changeStudiensemesterVar()
+	{
+		$name = $this->input->post('name');
+		$change = $this->input->post('change');
+
+		$result = $this->variablelib->changeStudiensemesterVar($this->_uid, $name, $change);
+
+		$this->outputJson($result);
+	}
+
+	/**
+	 * Retrieve the UID of the logged user and checks if it is valid
+	 */
+	private function _setAuthUID()
+	{
+		$this->_uid = getAuthUID();
+
+		if (!$this->_uid) show_error('User authentification failed');
+	}
+}
diff --git a/application/controllers/system/infocenter/InfoCenter.php b/application/controllers/system/infocenter/InfoCenter.php
index d59c058cf..c803520ed 100644
--- a/application/controllers/system/infocenter/InfoCenter.php
+++ b/application/controllers/system/infocenter/InfoCenter.php
@@ -136,6 +136,8 @@ class InfoCenter extends Auth_Controller
 
 		$this->_setAuthUID(); // sets property uid
 
+		$this->load->library('VariableLib', array('uid' => $this->_uid));
+
 		$this->setControllerId(); // sets the controller id
     }
 
diff --git a/application/libraries/VariableLib.php b/application/libraries/VariableLib.php
new file mode 100644
index 000000000..3d732984f
--- /dev/null
+++ b/application/libraries/VariableLib.php
@@ -0,0 +1,131 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Class VariableLib
+ * Provides functionality for managing uservariables for currently logged in user.
+ * Preloads variables for a user, so variables can be retrieved from views without getting uid again.
+ */
+class VariableLib
+{
+	private $_variables; // Contains the retrieved variables
+
+	/**
+	 * VariableLib constructor.
+	 * Loads variable of logged in user.
+	 * @param $loggeduid
+	 */
+	public function __construct($loggeduid)
+	{
+		$this->_ci =& get_instance();
+
+		$this->_variables = null;
+
+		$this->_ci->load->model('system/Variable_model', 'VariableModel');
+		$this->_ci->load->model('organisation/studiensemester_model', 'StudiensemesterModel');
+
+		if (isset($loggeduid['uid']) && !isEmptyString($loggeduid['uid']))
+			$this->_setVariables($loggeduid['uid']);
+		else
+		{
+			show_error('uid of logged user not passed!');
+		}
+	}
+
+	/**
+	 * Gets an already loaded user variable by variable name.
+	 * @param $name
+	 * @return mixed|null
+	 */
+	public function getVar($name)
+	{
+		return isset($this->_variables[$name]) ? $this->_variables[$name] : null;
+	}
+
+	/**
+	 * Changes variables having Studiensemester as value. Sets variable value to next or previous Semester.
+	 * @param $uid variable is set for this user
+	 * @param $name variable name
+	 * @param $change if positive, variable value is set to next semester, negative - previous semester
+	 * @return array if change was successfull, uid and variable name. Infotext otherwise.
+	 */
+	public function changeStudiensemesterVar($uid, $name, $change)
+	{
+		$result = error('error when setting variable!');
+		$notchangedtext = "Studiensemester variable not changed.";
+
+		if (!isEmptyString($uid) && !isEmptyString($name) && is_numeric($change))
+		{
+			$change = (int) $change;
+			$varres = $this->_ci->VariableModel->getVariables($uid, array($name));
+
+			if (isSuccess($varres))
+			{
+				if (hasData($varres))
+				{
+					$currStudiensemester = getData($varres);
+
+					if ($change === 0)
+					{
+						$result = success($notchangedtext);
+					}
+					else
+					{
+						if ($change > 0)
+						{
+							$changedsem = $this->_ci->StudiensemesterModel->getNextFrom($currStudiensemester[$name]);
+						}
+						elseif ($change < 0)
+						{
+							$changedsem = $this->_ci->StudiensemesterModel->getPreviousFrom($currStudiensemester[$name]);
+						}
+
+						if (hasData($changedsem))
+						{
+							$changedsem = getData($changedsem);
+
+							$result = $this->_ci->VariableModel->setVariable($uid, $name, $changedsem[0]->studiensemester_kurzbz);
+							//update property
+							$this->_setVariable($uid, $name);
+						}
+						else
+						{
+							$result = success($notchangedtext);
+						}
+					}
+				}
+			}
+		}
+		return $result;
+	}
+
+	/**
+	 * "Refreshes" variable value with given name by retrieving current value from db and saving it.
+	 * @param $uid
+	 * @param $name
+	 */
+	private function _setVariable($uid, $name)
+	{
+		$variable = $this->_ci->VariableModel->getVariables($uid, array($name));
+
+		if (hasData($variable))
+		{
+			$variable = getData($variable);
+			$this->_variables[$name] = $variable[$name];
+		}
+	}
+
+	/**
+	 * "Refreshes" all variable values by retrieving current values from db and saving them.
+	 * @param $uid
+	 */
+	private function _setVariables($uid)
+	{
+		$variables = $this->_ci->VariableModel->getVariables($uid);
+		if (hasData($variables))
+		{
+			$this->_variables = getData($variables);
+		}
+	}
+}
diff --git a/application/models/system/Variable_model.php b/application/models/system/Variable_model.php
index 9800999fe..1fcb5b274 100644
--- a/application/models/system/Variable_model.php
+++ b/application/models/system/Variable_model.php
@@ -10,5 +10,92 @@ class Variable_model extends DB_Model
 		parent::__construct();
 		$this->dbTable = 'public.tbl_variable';
 		$this->pk = array('uid', 'name');
+		$this->hasSequence = false;
+
+		$this->load->model('system/Variablenname_model', 'VariablennameModel');
+	}
+
+	/**
+	 * Gets user variables and values for a uid.
+	 * If no value found in tbl_variable, default as defined in variablename_model is retrieved.
+	 * @param $uid
+	 * @param null $names optionally get only certain variables
+	 * @return array
+	 */
+	public function getVariables($uid, $names = null)
+	{
+		if (isEmptyString($uid) || (isset($names) && !is_array($names)))
+			$result = error('wrong parameters passed');
+		else
+		{
+			$vardata = array();
+
+			$qry = "SELECT name, wert FROM public.tbl_variable WHERE uid = ?";
+
+			if (isset($names))
+			{
+				$qry .= " AND name IN ('".implode(',', $names)."')";
+			}
+			$qry .= ";";
+
+			$varresults = $this->execQuery($qry, array($uid));
+
+			if (hasData($varresults))
+			{
+				$varresults = getData($varresults);
+					foreach ($varresults as $varresult)
+					{
+						if (isset($varresult->wert))
+							$vardata[$varresult->name] = $varresult->wert;
+					}
+			}
+
+			$vardefaults = $this->VariablennameModel->getDefaults($names);
+
+			if (hasData($vardefaults))
+			{
+				$vardefaults = getData($vardefaults);
+
+
+				foreach ($vardefaults as $vardefault)
+				{
+					if (!isset($vardata[$vardefault->name]) && isset($vardefault->defaultwert))
+					{
+						$vardata[$vardefault->name] = $vardefault->defaultwert;
+					}
+				}
+			}
+			$result = success($vardata);
+		}
+
+		return $result;
+	}
+
+	/**
+	 * Sets a variable value for a uid. Adds new entry if not present, updates entry otherwise.
+	 * @param $uid
+	 * @param $name
+	 * @param $wert
+	 * @return array
+	 */
+	public function setVariable($uid, $name, $wert)
+	{
+		$result = error('error when setting variable!');
+		if (!isEmptyString($uid) && !isEmptyString($name) && !isEmptyString($wert))
+		{
+			$varres = $this->loadWhere(array('uid' => $uid, 'name' => $name));
+
+			if (isSuccess($varres))
+			{
+				if (hasData($varres))
+				{
+					$result = $this->VariableModel->update(array('uid' => $uid, 'name' => $name), array('wert' => $wert));
+				}
+				else
+					$result = $this->VariableModel->insert(array('uid' => $uid, 'name' => $name, 'wert' => $wert));
+			}
+		}
+
+		return $result;
 	}
 }
diff --git a/application/models/system/Variablenname_model.php b/application/models/system/Variablenname_model.php
new file mode 100644
index 000000000..ada1d330c
--- /dev/null
+++ b/application/models/system/Variablenname_model.php
@@ -0,0 +1,78 @@
+<?php
+
+class Variablenname_model extends DB_Model
+{
+	// Contains SQL queries retrieving default variable values if no default is set.
+	private $_dynamic_defaults = array(
+		'semester_aktuell' => 'SELECT studiensemester_kurzbz FROM public.tbl_studiensemester WHERE ende>now() ORDER BY start LIMIT 1',
+		'infocenter_studiensemester' => 'SELECT studiensemester_kurzbz FROM (
+										   SELECT DISTINCT ON (studienjahr_kurzbz) start, studiensemester_kurzbz
+										   FROM public.tbl_studiensemester
+										   ORDER BY studienjahr_kurzbz, start
+                                   		) sem
+										WHERE start > now()
+										LIMIT 1;'
+	);
+
+	/**
+	 * Constructor
+	 */
+	public function __construct()
+	{
+		parent::__construct();
+		$this->dbTable = 'public.tbl_variablenname';
+		$this->pk ='name';
+	}
+
+	/**
+	 * Gets defaults for user variables.
+	 * If no default value present in table, SQL can be executed for retrieving the value.
+	 * @param null $names optionally get only defaults for certain variables
+	 * @return array
+	 */
+	public function getDefaults($names = null)
+	{
+		$defaults = array();
+
+		$qry = "SELECT name, defaultwert FROM public.tbl_variablenname";
+
+		if (isset($names) && is_array($names))
+		{
+			$qry .= " WHERE name IN ('".implode(',', $names)."')";
+		}
+		$qry .= ";";
+
+		$defaultsres = $this->execQuery($qry);
+
+		if (hasData($defaultsres))
+		{
+			$defaults = getData($defaultsres);
+
+			foreach ($defaults as $default)
+			{
+				if (!isset($default->defaultwert))
+				{
+					if (isset($this->_dynamic_defaults[$default->name]))
+					{
+						$dyndefault = $this->execQuery($this->_dynamic_defaults[$default->name]);
+						if (hasData($dyndefault))
+						{
+							$dyndefault = getData($dyndefault);
+
+							if (count($dyndefault) === 1)
+							{
+								foreach ($dyndefault[0] as $value)
+								{
+									$default->defaultwert = $value;
+									break;
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+
+		return success($defaults);
+	}
+}
diff --git a/application/views/system/infocenter/infocenter.php b/application/views/system/infocenter/infocenter.php
index ebc99ba93..4005518a1 100644
--- a/application/views/system/infocenter/infocenter.php
+++ b/application/views/system/infocenter/infocenter.php
@@ -18,7 +18,7 @@
 				'global' => array('mailAnXversandt'),
 				'ui' => array('bitteEintragWaehlen')
 			),
-			'customCSSs' => 'public/css/sbadmin2/tablesort_bootstrap.css',
+			'customCSSs' => array('public/css/sbadmin2/tablesort_bootstrap.css', 'public/css/infocenter/infocenterPersonDataset.css'),
 			'customJSs' => array('public/js/bootstrapper.js', 'public/js/infocenter/infocenterPersonDataset.js')
 		)
 	);
diff --git a/application/views/system/infocenter/infocenterData.php b/application/views/system/infocenter/infocenterData.php
index d888f6cd7..6dd0ee957 100644
--- a/application/views/system/infocenter/infocenterData.php
+++ b/application/views/system/infocenter/infocenterData.php
@@ -11,16 +11,9 @@
 	$STATUS_KURZBZ = '\'Wartender\', \'Bewerber\', \'Aufgenommener\', \'Student\'';
 	$ADDITIONAL_STG = '10021,10027';
 	$AKTE_TYP = '\'identity\', \'zgv_bakk\'';
+	$STUDIENSEMESTER = '\''.$this->variablelib->getVar('infocenter_studiensemester').'\'';
 
 	$query = '
-		WITH currentOrNextStudiensemester AS (
-			SELECT ss.studiensemester_kurzbz
-			  FROM public.tbl_studiensemester ss
-			 WHERE ss.ende > NOW()
-		  ORDER BY ss.ende
-			 LIMIT 3
-		)
-
 		SELECT
 			p.person_id AS "PersonId",
 			p.vorname AS "Vorname",
@@ -100,7 +93,7 @@
 					   OR
 					   sg.studiengang_kz in('.$ADDITIONAL_STG.')
 					   )
-				   AND pss.studiensemester_kurzbz IN (SELECT cnss.studiensemester_kurzbz FROM currentOrNextStudiensemester cnss)
+				   AND pss.studiensemester_kurzbz = '.$STUDIENSEMESTER.'
 				   AND NOT EXISTS (
 					   SELECT 1
 						 FROM tbl_prestudentstatus spss
@@ -125,7 +118,7 @@
 					   OR
 					   sg.studiengang_kz in('.$ADDITIONAL_STG.')
 					   )
-				   AND pss.studiensemester_kurzbz IN (SELECT cnss.studiensemester_kurzbz FROM currentOrNextStudiensemester cnss)
+				   AND pss.studiensemester_kurzbz = '.$STUDIENSEMESTER.'
 				   AND NOT EXISTS (
 						SELECT 1
 						  FROM tbl_prestudentstatus spss
@@ -149,7 +142,7 @@
 					   OR
 					   sg.studiengang_kz in('.$ADDITIONAL_STG.')
 					   )
-				   AND pss.studiensemester_kurzbz IN (SELECT cnss.studiensemester_kurzbz FROM currentOrNextStudiensemester cnss)
+				   AND pss.studiensemester_kurzbz = '.$STUDIENSEMESTER.'
 				   AND NOT EXISTS (
 					   SELECT 1
 						 FROM tbl_prestudentstatus spss
@@ -173,7 +166,8 @@
 					   OR
 					   sg.studiengang_kz in('.$ADDITIONAL_STG.')
 					   )
-				   AND pss.studiensemester_kurzbz IN (SELECT cnss.studiensemester_kurzbz FROM currentOrNextStudiensemester cnss)
+				   AND pss.studiensemester_kurzbz = '.$STUDIENSEMESTER.'
+
 				   AND NOT EXISTS (
 					  SELECT 1
 						FROM tbl_prestudentstatus spss
@@ -252,7 +246,7 @@
 						 WHERE spss.prestudent_id = sps.prestudent_id
 						   AND spss.status_kurzbz = '.$INTERESSENT_STATUS.'
 						   AND spss.bestaetigtam IS NULL
-						   AND spss.studiensemester_kurzbz IN (SELECT ss.studiensemester_kurzbz FROM public.tbl_studiensemester ss WHERE ss.ende > NOW())
+						   AND spss.studiensemester_kurzbz = '.$STUDIENSEMESTER.'
 					)
 			)
 	ORDER BY "LastAction" ASC';
diff --git a/application/views/system/infocenter/infocenterFreigegeben.php b/application/views/system/infocenter/infocenterFreigegeben.php
index 40f69528d..15e73f1b6 100644
--- a/application/views/system/infocenter/infocenterFreigegeben.php
+++ b/application/views/system/infocenter/infocenterFreigegeben.php
@@ -18,7 +18,7 @@
 				'global' => array('mailAnXversandt'),
 				'ui' => array('bitteEintragWaehlen')
 			),
-			'customCSSs' => 'public/css/sbadmin2/tablesort_bootstrap.css',
+			'customCSSs' => array('public/css/sbadmin2/tablesort_bootstrap.css', 'public/css/infocenter/infocenterPersonDataset.css'),
 			'customJSs' => array('public/js/bootstrapper.js', 'public/js/infocenter/infocenterPersonDataset.js')
 		)
 	);
diff --git a/application/views/system/infocenter/infocenterFreigegebenData.php b/application/views/system/infocenter/infocenterFreigegebenData.php
index 059e30a80..20548d3f4 100644
--- a/application/views/system/infocenter/infocenterFreigegebenData.php
+++ b/application/views/system/infocenter/infocenterFreigegebenData.php
@@ -8,6 +8,7 @@
 	$REJECTED_STATUS = '\'Abgewiesener\'';
 	$ADDITIONAL_STG = '10021,10027,10002';
 	$STATUS_KURZBZ = '\'Wartender\', \'Bewerber\', \'Aufgenommener\', \'Student\'';
+	$STUDIENSEMESTER = '\''.$this->variablelib->getVar('infocenter_studiensemester').'\'';
 
 	$query = '
 		SELECT
@@ -179,7 +180,7 @@
 				) rtp ON(rtp.person_id = ps.person_id AND rtp.studiensemester_kurzbz = pss.studiensemester_kurzbz)
 				 WHERE pss.status_kurzbz = '.$INTERESSENT_STATUS.'
 				   AND ps.person_id = p.person_id
-				   AND pss.studiensemester_kurzbz IN (SELECT ss.studiensemester_kurzbz FROM public.tbl_studiensemester ss WHERE ss.studiensemester_kurzbz = \'WS2019\')
+				   AND pss.studiensemester_kurzbz IN (SELECT ss.studiensemester_kurzbz FROM public.tbl_studiensemester ss WHERE ss.studiensemester_kurzbz = '.$STUDIENSEMESTER.')
 			  ORDER BY pss.datum DESC, pss.insertamum DESC, pss.ext_id DESC
 				 LIMIT 1
 			) AS "ReihungstestApplied",
@@ -215,7 +216,7 @@
 							AND pss.status_kurzbz = '.$INTERESSENT_STATUS.'
 							AND pss.bestaetigtam IS NOT NULL
 							AND pss.bewerbung_abgeschicktamum IS NOT NULL
-							AND pss.studiensemester_kurzbz IN (SELECT ss.studiensemester_kurzbz FROM public.tbl_studiensemester ss WHERE ss.ende >= NOW())
+							AND pss.studiensemester_kurzbz = '.$STUDIENSEMESTER.'
 				AND NOT EXISTS (
 					   SELECT 1
 						 FROM tbl_prestudentstatus spss
diff --git a/application/views/system/infocenter/infocenterReihungstestAbsolviert.php b/application/views/system/infocenter/infocenterReihungstestAbsolviert.php
index d40b7a572..79f75885b 100644
--- a/application/views/system/infocenter/infocenterReihungstestAbsolviert.php
+++ b/application/views/system/infocenter/infocenterReihungstestAbsolviert.php
@@ -18,7 +18,7 @@
 				'global' => array('mailAnXversandt'),
 				'ui' => array('bitteEintragWaehlen')
 			),
-			'customCSSs' => 'public/css/sbadmin2/tablesort_bootstrap.css',
+			'customCSSs' => array('public/css/sbadmin2/tablesort_bootstrap.css', 'public/css/infocenter/infocenterPersonDataset.css'),
 			'customJSs' => array('public/js/bootstrapper.js', 'public/js/infocenter/infocenterPersonDataset.js')
 		)
 	);
diff --git a/application/views/system/infocenter/infocenterReihungstestAbsolviertData.php b/application/views/system/infocenter/infocenterReihungstestAbsolviertData.php
index ff488b6dc..46f952ec3 100644
--- a/application/views/system/infocenter/infocenterReihungstestAbsolviertData.php
+++ b/application/views/system/infocenter/infocenterReihungstestAbsolviertData.php
@@ -6,6 +6,7 @@
 	$TAETIGKEIT_KURZBZ = '\'bewerbung\', \'kommunikation\'';
 	$LOGDATA_NAME = '\'Login with code\', \'Login with user\', \'New application\'';
 	$ADDITIONAL_STG = '10021,10027';
+	$STUDIENSEMESTER = '\''.$this->variablelib->getVar('infocenter_studiensemester').'\'';
 
 	$query = '
 		SELECT
@@ -191,7 +192,7 @@
 							AND pss.status_kurzbz = '.$INTERESSENT_STATUS.'
 							AND pss.bestaetigtam IS NOT NULL
 							AND pss.bewerbung_abgeschicktamum IS NOT NULL
-							AND pss.studiensemester_kurzbz IN (SELECT ss.studiensemester_kurzbz FROM public.tbl_studiensemester ss WHERE ss.ende >= NOW())
+							AND pss.studiensemester_kurzbz = '.$STUDIENSEMESTER.'
 				)
 			)
 	ORDER BY "LastAction" DESC';
diff --git a/public/css/infocenter/infocenterPersonDataset.css b/public/css/infocenter/infocenterPersonDataset.css
new file mode 100644
index 000000000..2e0edf07f
--- /dev/null
+++ b/public/css/infocenter/infocenterPersonDataset.css
@@ -0,0 +1,7 @@
+/* styles for infocenter overview page */
+
+/* horizontal line after Studiensemester in dataset table header */
+hr.studiensemesterline
+{
+   margin: 6px 6px;
+}
\ No newline at end of file
diff --git a/public/js/infocenter/infocenterPersonDataset.js b/public/js/infocenter/infocenterPersonDataset.js
index dc6af2284..54933165d 100644
--- a/public/js/infocenter/infocenterPersonDataset.js
+++ b/public/js/infocenter/infocenterPersonDataset.js
@@ -19,18 +19,26 @@ if (FHC_JS_DATA_STORAGE_OBJECT.called_method == 'index')
  *
  */
 var InfocenterPersonDataset = {
+	infocenter_studiensemester_variablename: 'infocenter_studiensemester',
 
 	/**
 	 * adds person table additional actions html (above and beneath it)
 	 */
-	appendTableActionsHtml: function()
+	appendTableActionsHtml: function(infocenter_studiensemester)
 	{
-		var currurl = window.location.href;
 		var url = FHC_JS_DATA_STORAGE_OBJECT.app_root + FHC_JS_DATA_STORAGE_OBJECT.ci_router + "/system/Messages/write";
 
 		var formHtml = '<form id="sendMsgsForm" method="post" action="'+ url +'" target="_blank"></form>';
 		$("#datasetActionsTop").before(formHtml);
 
+		var studienSemesterHtml = '<button class="btn btn-default btn-xs decStudiensemester">' +
+			'<i class="fa fa-chevron-left"></i>' +
+			'</button>&nbsp;' +
+			infocenter_studiensemester +
+			'&nbsp;<button class="btn btn-default btn-xs incStudiensemester">' +
+			'<i class="fa fa-chevron-right"></i>' +
+			'</button>';
+
 		var selectAllHtml =
 			'<a href="javascript:void(0)" class="selectAll">' +
 			'<i class="fa fa-check"></i>&nbsp;Alle</a>&nbsp;&nbsp;' +
@@ -44,6 +52,21 @@ var InfocenterPersonDataset = {
 		var legendHtml = '<i class="fa fa-circle text-danger"></i> Gesperrt&nbsp;&nbsp;&nbsp;&nbsp;' +
 			'<i class="fa fa-circle text-info"></i> Geparkt';
 
+		// userdefined Semestervariable shown independently of personcount,
+		// it is possible to change the semester
+		$("#datasetActionsTop, #datasetActionsBottom").append(
+			"<div class='row'>"+
+			"<div class='col-xs-12 text-center'>"+studienSemesterHtml+"</div>"+
+			"</div><div class='h-divider'></div><hr class='studiensemesterline'>");
+
+		$("button.incStudiensemester").click(function() {
+			InfocenterPersonDataset.changeStudiensemesterUservar(1);
+		});
+
+		$("button.decStudiensemester").click(function() {
+			InfocenterPersonDataset.changeStudiensemesterUservar(-1);
+		});
+
 		var personcount = 0;
 
 		FHC_AjaxClient.ajaxCallGet(
@@ -70,9 +93,9 @@ var InfocenterPersonDataset = {
 
 							$("#datasetActionsTop, #datasetActionsBottom").append(
 								"<div class='row'>"+
-								"<div class='col-xs-6'>" + selectAllHtml + "&nbsp;&nbsp;" + actionHtml + "</div>"+
-								"<div class='col-xs-4'>" + legendHtml + "</div>"+
-								"<div class='col-xs-2 text-right'>" +
+								"<div class='col-xs-4'>" + selectAllHtml + "&nbsp;&nbsp;" + actionHtml + "</div>"+
+								"<div class='col-xs-4 text-center'>" + legendHtml + "</div>"+
+								"<div class='col-xs-4 text-right'>" +
 								"<span class='filterTableDatasetCntFiltered'></span>" +
 								countHtml +	"</div>"+
 								"<div class='clearfix'></div>"+
@@ -125,8 +148,65 @@ var InfocenterPersonDataset = {
 				trs.find("input[name=PersonId\\[\\]]").prop("checked", false);
 			}
 		);
-	}
+	},
 
+	/**
+	 * initializes change of the uservariable infocenter_studiensemesster, either
+	 * to next semester (change > 0) or previous semester (change < 0)
+	 */
+	changeStudiensemesterUservar: function(change)
+	{
+		FHC_AjaxClient.showVeil();
+
+		FHC_AjaxClient.ajaxCallPost(
+			'system/Variables/changeStudiensemesterVar',
+			{
+				'name': InfocenterPersonDataset.infocenter_studiensemester_variablename,
+				'change': change
+			},
+			{
+				successCallback: function(data, textStatus, jqXHR) {
+					if (FHC_AjaxClient.hasData(data))
+					{
+						// refresh filterwidget with page reload
+						FHC_FilterWidget.reloadDataset();
+					}
+				},
+				errorCallback: function(jqXHR, textStatus, errorThrown) {
+					FHC_AjaxClient.hideVeil();
+					alert(textStatus);//TODO dialoglib
+				}
+			}
+		);
+	},
+
+	/**
+	 * initializes call to get the Studiensemester user variable
+	 */
+	getStudiensemesterUservar: function(callback)
+	{
+		FHC_AjaxClient.ajaxCallGet(
+			'system/Variables/getVar',
+			{
+				'name': InfocenterPersonDataset.infocenter_studiensemester_variablename
+			},
+			{
+				successCallback: function(data, textStatus, jqXHR) {
+					if (FHC_AjaxClient.hasData(data))
+					{
+						if (typeof callback === "function")
+						{
+							var infocenter_studiensemester = FHC_AjaxClient.getData(data);
+							callback(infocenter_studiensemester[InfocenterPersonDataset.infocenter_studiensemester_variablename]);
+						}
+					}
+				},
+				errorCallback: function(jqXHR, textStatus, errorThrown) {
+					alert(textStatus);
+				}
+			}
+		);
+	}
 };
 
 /**
@@ -134,6 +214,6 @@ var InfocenterPersonDataset = {
  */
 $(document).ready(function() {
 
-	InfocenterPersonDataset.appendTableActionsHtml();
+	InfocenterPersonDataset.getStudiensemesterUservar(InfocenterPersonDataset.appendTableActionsHtml);
 
 });