diff --git a/application/applicationcontext.class.inc.php b/application/applicationcontext.class.inc.php
index fd29c7ab5..97bb0cd6c 100644
--- a/application/applicationcontext.class.inc.php
+++ b/application/applicationcontext.class.inc.php
@@ -57,9 +57,10 @@ class ApplicationContext
 		if (empty(self::$aDefaultValues))
 		{
 			self::$aDefaultValues = array();
+			$aContext = utils::ReadParam('c', array());
 			foreach($this->aNames as $sName)
 			{
-				$sValue = utils::ReadParam($sName, '');
+				$sValue = isset($aContext[$sName]) ? $aContext[$sName] : '';
 				// TO DO: check if some of the context parameters are mandatory (or have default values)
 				if (!empty($sValue))
 				{
@@ -70,6 +71,20 @@ class ApplicationContext
 		$this->aValues = self::$aDefaultValues;
 	}
 	
+	/**
+	 * Returns the current value for the given parameter
+	 * @param string $sParamName Name of the parameter to read
+	 * @return mixed The value for this parameter
+	 */
+	public function GetCurrentValue($sParamName, $defaultValue = '')
+	{
+		if (isset($this->aValues[$sParamName]))
+		{
+			return $this->aValues[$sParamName];
+		}
+		return $defaultValue;
+	}
+	
 	/**
 	 * Returns the context as string with the format name1=value1&name2=value2....
 	 * return string The context as a string to be appended to an href property
@@ -79,7 +94,7 @@ class ApplicationContext
 		$aParams = array();
 		foreach($this->aValues as $sName => $sValue)
 		{
-			$aParams[] = $sName.'='.urlencode($sValue);
+			$aParams[] = "c[$sName]".'='.urlencode($sValue);
 		}
 		return implode("&", $aParams);
 	}
@@ -93,7 +108,7 @@ class ApplicationContext
 		$sContext = "";
 		foreach($this->aValues as $sName => $sValue)
 		{
-			$sContext .= "<input type=\"hidden\" name=\"$sName\" value=\"$sValue\" />\n";
+			$sContext .= "<input type=\"hidden\" name=\"c[$sName]\" value=\"$sValue\" />\n";
 		}
 		return $sContext;
 	}
@@ -104,7 +119,12 @@ class ApplicationContext
 	 */
 	public function GetAsHash()
 	{
-		return $this->aValues;
+		$aReturn = array();
+		foreach($this->aValues as $sName => $sValue)
+		{
+			$aReturn["c[$sName]"] = $sValue;
+		}
+		return $aReturn;
 	}
 	
 	/**
diff --git a/application/cmdbabstract.class.inc.php b/application/cmdbabstract.class.inc.php
index 64693fa20..e8236ff7b 100644
--- a/application/cmdbabstract.class.inc.php
+++ b/application/cmdbabstract.class.inc.php
@@ -899,7 +899,8 @@ EOF
 			}
 			$aOptions[MetaModel::GetName($sClassName)] = "<option selected value=\"$sClassName\">".MetaModel::GetName($sClassName)."</options>\n";
 			ksort($aOptions);
-			$sClassesCombo = "<select name=\"class\" onChange=\"ReloadSearchForm('$sSearchFormId', this.value, '$sRootClass')\">\n".implode('', $aOptions)."</select>\n";
+			$sContext = $oAppContext->GetForLink();
+			$sClassesCombo = "<select name=\"class\" onChange=\"ReloadSearchForm('$sSearchFormId', this.value, '$sRootClass', '$sContext')\">\n".implode('', $aOptions)."</select>\n";
 		}
 		else
 		{
@@ -919,7 +920,7 @@ EOF
 		$aList = MetaModel::GetZListItems($sClassName, 'standard_search');
 		foreach($aList as $sFilterCode)
 		{
-			$oAppContext->Reset($sFilterCode); // Make sure the same parameter will not be passed twice
+			//$oAppContext->Reset($sFilterCode); // Make sure the same parameter will not be passed twice
 			$sHtml .= '<span style="white-space: nowrap;padding:5px;display:inline-block;">';
 			$sFilterValue = '';
 			$sFilterValue = utils::ReadParam($sFilterCode, '');
@@ -1607,5 +1608,15 @@ EOF
 		}
 		return $aResult;
 	}
+	
+	/**
+	 * Maps the given context parameter name to the appropriate filter/search code for this class
+	 * @param string $sContextParam Name of the context parameter, i.e. 'org_id'
+	 * @return string Filter code, i.e. 'customer_id'
+	 */
+	public static function MapContextParam($sContextParam)
+	{
+		return $sContextParam;
+	}
 }
 ?>
diff --git a/application/displayblock.class.inc.php b/application/displayblock.class.inc.php
index 82cadaac6..91467bd67 100644
--- a/application/displayblock.class.inc.php
+++ b/application/displayblock.class.inc.php
@@ -320,17 +320,29 @@ class DisplayBlock
 			}
 			if ($this->m_sStyle != 'links')
 			{
-				$aFilterCodes = array_keys(MetaModel::GetClassFilterDefs($this->m_oFilter->GetClass()));
+				$oAppContext = new ApplicationContext();
+				$sClass = $this->m_oFilter->GetClass();
+				$aFilterCodes = array_keys(MetaModel::GetClassFilterDefs($sClass));
+				foreach($oAppContext->GetNames() as $sContextParam)
+				{
+					eval("\$sParamCode = $sClass::MapContextParam('$sFilterCode');"); //Map context parameter to the value/filter code depending on the class
+				}
 				foreach($aFilterCodes as $sFilterCode)
 				{
 					$sExternalFilterValue = utils::ReadParam($sFilterCode, '');
 					if (isset($aExtraParams[$sFilterCode]))
 					{
-						$this->m_oFilter->AddCondition($sFilterCode, trim($aExtraParams[$sFilterCode])); // Use the default 'loose' operator
+						$condition = $aExtraParams[$sFilterCode];
 					}
 					else if ($bDoSearch && $sExternalFilterValue != "")
 					{
-						$this->m_oFilter->AddCondition($sFilterCode, trim($sExternalFilterValue)); // Use the default 'loose' operator
+						// Search takes precedence over context params...
+						$condition = trim($sExternalFilterValue);
+					}
+
+					if (!is_null($condition))
+					{
+						$this->m_oFilter->AddCondition($sFilterCode, $condition); // Use the default 'loose' operator
 					}
 				}
 			}
@@ -582,7 +594,7 @@ class DisplayBlock
 				$aFilterCodes = array_keys(MetaModel::GetClassFilterDefs($this->m_oFilter->GetClass()));
 				foreach($oAppContext->GetNames() as $sFilterCode)
 				{
-					$sContextParamValue = trim(utils::ReadParam($sFilterCode, null));
+					$sContextParamValue = $oAppContext->GetCurrentValue($sFilterCode, null);
 					if (!is_null($sContextParamValue) && ! empty($sContextParamValue) && MetaModel::IsValidFilterCode($sClass, $sFilterCode))
 					{
 						$this->m_oFilter->AddCondition($sFilterCode, $sContextParamValue); // Use the default 'loose' operator
@@ -596,7 +608,7 @@ class DisplayBlock
 				$this->m_oSet = new CMDBObjectSet($this->m_oFilter, array(), $aQueryParams);				
 			}
 			$iCount = $this->m_oSet->Count();
-			$sHyperlink = '../pages/UI.php?operation=search&filter='.$this->m_oFilter->serialize();
+			$sHyperlink = '../pages/UI.php?operation=search&'.$oAppContext->GetForLink().'&filter='.$this->m_oFilter->serialize();
 			$sHtml .= '<p><a class="actions" href="'.$sHyperlink.'">';
 			$sHtml .= MetaModel::GetClassIcon($sClass, true, 'float;left;margin-right:10px;');
 			$sHtml .= MetaModel::GetName($sClass).': '.$iCount.'</a></p>';
@@ -624,7 +636,7 @@ class DisplayBlock
 				$aFilterCodes = array_keys(MetaModel::GetClassFilterDefs($this->m_oFilter->GetClass()));
 				foreach($oAppContext->GetNames() as $sFilterCode)
 				{
-					$sContextParamValue = trim(utils::ReadParam($sFilterCode, null));
+					$sContextParamValue = $oAppContext->GetCurrentValue($sFilterCode, null);
 					if (!is_null($sContextParamValue) && ! empty($sContextParamValue) && MetaModel::IsValidFilterCode($sClass, $sFilterCode))
 					{
 						$this->m_oFilter->AddCondition($sFilterCode, $sContextParamValue); // Use the default 'loose' operator
@@ -657,7 +669,7 @@ class DisplayBlock
 					}
 					else
 					{
-						$sHyperlink = '../pages/UI.php?operation=search&filter='.$oFilter->serialize();
+						$sHyperlink = '../pages/UI.php?operation=search&'.$oAppContext->GetForLink().'&filter='.$oFilter->serialize();
 						$aCounts[$sStateValue] = "<a href=\"$sHyperlink\">{$aCounts[$sStateValue]}</a>";
 					}
 				}
@@ -666,7 +678,7 @@ class DisplayBlock
 			$sHtml .= '<tr><td>'.implode('</td><td>', $aCounts).'</td></tr></table></div>';
 			// Title & summary
 			$iCount = $this->m_oSet->Count();
-			$sHyperlink = '../pages/UI.php?operation=search&filter='.$this->m_oFilter->serialize();
+			$sHyperlink = '../pages/UI.php?operation=search&'.$oAppContext->GetForLink().'&filter='.$this->m_oFilter->serialize();
 			$sHtml .= '<h1>'.Dict::S(str_replace('_', ':', $sTitle)).'</h1>';
 			$sHtml .= '<a class="summary" href="'.$sHyperlink.'">'.Dict::Format(str_replace('_', ':', $sLabel), $iCount).'</a>';
 			break;
diff --git a/application/itopwebpage.class.inc.php b/application/itopwebpage.class.inc.php
index 2255eed43..3ab63d2ea 100644
--- a/application/itopwebpage.class.inc.php
+++ b/application/itopwebpage.class.inc.php
@@ -32,12 +32,12 @@ require_once("../application/user.preferences.class.inc.php");
 class iTopWebPage extends NiceWebPage
 {
 	private $m_sMenu;
-	private $m_currentOrganization;
+//	private $m_currentOrganization;
 	private $m_aTabs;
 	private $m_sCurrentTabContainer;
 	private $m_sCurrentTab;
 	
-    public function __construct($sTitle, $currentOrganization)
+    public function __construct($sTitle)
     {
         parent::__construct($sTitle);
         $this->m_sCurrentTabContainer = '';
@@ -46,7 +46,7 @@ class iTopWebPage extends NiceWebPage
 		$this->m_sMenu = "";
 		$oAppContext = new ApplicationContext();
 		$sExtraParams = $oAppContext->GetForLink();
-		$this->m_currentOrganization = $currentOrganization;
+//		$this->m_currentOrganization = $currentOrganization;
 		$this->add_header("Content-type: text/html; charset=utf-8");
 		$this->add_header("Cache-control: no-cache");
 		$this->add_linked_stylesheet("../css/jquery.treeview.css");
@@ -478,15 +478,17 @@ EOF
 			break;
 			
 			default:
+			$oAppContext = new ApplicationContext();
+			$iCurrentOrganization = $oAppContext->GetCurrentValue('org_id');
 			$sHtml = '<div id="SiloSelection">';
-			$sHtml .= '<form style="display:inline" action="'.$_SERVER['PHP_SELF'].'"><select style="width:150px;font-size:x-small" name="org_id" title="Pick an organization" onChange="this.form.submit();">';
-			$sSelected = ($this->m_currentOrganization == '') ? ' selected' : '';
+			$sHtml .= '<form style="display:inline" action="'.$_SERVER['PHP_SELF'].'"><select style="width:150px;font-size:x-small" name="c[org_id]" title="Pick an organization" onChange="this.form.submit();">';
+			$sSelected = ($iCurrentOrganization == '') ? ' selected' : '';
 			$sHtml .= '<option value=""'.$sSelected.'>'.Dict::S('UI:AllOrganizations').'</option>';
 			while($oOrg = $oSet->Fetch())
 			{
-				if ($this->m_currentOrganization == $oOrg->GetKey())
+				if ($iCurrentOrganization == $oOrg->GetKey())
 				{
-					$oCurrentOrganization = $oOrg;
+//					$oCurrentOrganization = $oOrg;
 					$sSelected = " selected";
 			
 				}
@@ -498,8 +500,8 @@ EOF
 			}
 			$sHtml .= '</select>';
 			// Add other dimensions/context information to this form
-			$oAppContext = new ApplicationContext();
-			$oAppContext->Reset('org_id'); // Org id is handled above and we want to be able to change it here !
+//			$oAppContext = new ApplicationContext();
+			$oAppContext->Reset('org_id'); // org_id is handled above and we want to be able to change it here !
 			$sHtml .= $oAppContext->GetForForm();		
 			$sHtml .= '</form>';
 			$sHtml .= '</div>';
@@ -511,10 +513,9 @@ EOF
     {
 		// Display the menu
 		$oAppContext = new ApplicationContext();
-		$iActiveNodeId = ApplicationMenu::GetActiveNodeId();
 		$iAccordionIndex = 0;
 
-		ApplicationMenu::DisplayMenu($this, $oAppContext->GetAsHash(), $iActiveNodeId);
+		ApplicationMenu::DisplayMenu($this, $oAppContext->GetAsHash());
     }
 
 	/**
diff --git a/application/menunode.class.inc.php b/application/menunode.class.inc.php
index 012013c34..652a3b75d 100644
--- a/application/menunode.class.inc.php
+++ b/application/menunode.class.inc.php
@@ -218,7 +218,8 @@ class ApplicationMenu
 	 */
 	static public function GetActiveNodeId()
 	{
-		$iMenuIndex = utils::ReadParam('menu', -1);
+		$oAppContext = new ApplicationContext();
+		$iMenuIndex = $oAppContext->GetCurrentValue('menu', -1);
 		
 		if ($iMenuIndex  == -1)
 		{
@@ -319,7 +320,7 @@ abstract class MenuNode
 	
 	public function GetHyperlink($aExtraParams)
 	{
-		$aExtraParams['menu'] = $this->GetIndex();
+		$aExtraParams['c[menu]'] = $this->GetIndex();
 		return $this->AddParams('../pages/UI.php', $aExtraParams);
 	}
 	
@@ -593,7 +594,7 @@ class WebPageMenuNode extends MenuNode
 
 	public function GetHyperlink($aExtraParams)
 	{
-		$aExtraParams['menu'] = $this->GetIndex();
+		$aExtraParams['c[menu]'] = $this->GetIndex();
 		return $this->AddParams( $this->sHyperlink, $aExtraParams);
 	}
 	
@@ -631,7 +632,7 @@ class NewObjectMenuNode extends MenuNode
 	public function GetHyperlink($aExtraParams)
 	{
 		$sHyperlink = '../pages/UI.php?operation=new&class='.$this->sClass;
-		$aExtraParams['menu'] = $this->GetIndex();
+		$aExtraParams['c[menu]'] = $this->GetIndex();
 		return $this->AddParams($sHyperlink, $aExtraParams);
 	}
 
diff --git a/application/template.class.inc.php b/application/template.class.inc.php
index 52388acbc..dca6d7a29 100644
--- a/application/template.class.inc.php
+++ b/application/template.class.inc.php
@@ -240,7 +240,7 @@ class DisplayTemplate
 			</itoptab>
 		</itoptabs>';
 		
-		$oPage = new iTopWebPage('Unit Test', 3);
+		$oPage = new iTopWebPage('Unit Test');
 		//$oPage->add("Template content: <pre>".htmlentities($sTemplate)."</pre>\n");
 		$oTemplate = new DisplayTemplate($sTemplate);
 		$oTemplate->Render($oPage, array('class'=>'Network device','pkey'=> 271, 'name' => 'deliversw01.mecanorama.fr', 'org_id' => 3));
diff --git a/js/utils.js b/js/utils.js
index 58f48e618..ca7661a4c 100644
--- a/js/utils.js
+++ b/js/utils.js
@@ -99,7 +99,7 @@ function UpdateFileName(id, sNewFileName)
 /**
  * Reload a search form for the specified class
  */
-function ReloadSearchForm(divId, sClassName, sBaseClass)
+function ReloadSearchForm(divId, sClassName, sBaseClass, sContext)
 {
     var oDiv = $('#'+divId);
 	oDiv.block();
@@ -112,7 +112,7 @@ function ReloadSearchForm(divId, sClassName, sBaseClass)
 		aSubmit = oFormEvents.submit;
 	}
 
-	$.post('ajax.render.php',
+	$.post('ajax.render.php?'+sContext,
 	   { operation: 'search_form', className: sClassName, baseClass: sBaseClass, currentId: divId },
 	   function(data) {
 		   oDiv.empty();
diff --git a/pages/UI.php b/pages/UI.php
index 4285b17cc..d0eb13e7b 100644
--- a/pages/UI.php
+++ b/pages/UI.php
@@ -501,7 +501,6 @@ try
 
 	require_once('../application/startup.inc.php');
 	$oAppContext = new ApplicationContext();
-	$currentOrganization = utils::ReadParam('org_id', '');
 	$operation = utils::ReadParam('operation', '');
 
 	$oKPI = new ExecutionKPI();
@@ -511,7 +510,7 @@ try
 
 	$oKPI->ComputeAndReport('User login');
 
-	$oP = new iTopWebPage(Dict::S('UI:WelcomeToITop'), $currentOrganization);
+	$oP = new iTopWebPage(Dict::S('UI:WelcomeToITop'));
 
 	switch($operation)
 	{
@@ -781,7 +780,12 @@ try
 			$oP->add_linked_script("../js/linkswidget.js");
 			$oP->add_linked_script("../js/jquery.blockUI.js");
 
-			$aArgs = array_merge($oAppContext->GetAsHash(), utils::ReadParam('default', array()));
+			$aArgs = utils::ReadParam('default', array());
+			$aContext = $oAppContext->GetAsHash();
+			foreach( $oAppContext->GetNames() as $key)
+			{
+				$aArgs[$key] = $oAppContext->GetCurrentValue($key);	
+			}
 
 			// If the specified class has subclasses, ask the user an instance of which class to create
 			$aSubClasses = MetaModel::EnumChildClasses($sClass, ENUM_CHILD_CLASSES_ALL); // Including the specified class itself
@@ -818,9 +822,9 @@ try
 				$oP->add("<div class=\"wizContainer\">\n");
 				$aDefaults = utils::ReadParam('default', array());
 				$aContext = $oAppContext->GetAsHash();
-				foreach($aContext as $key => $value)
+				foreach( $oAppContext->GetNames() as $key)
 				{
-					$aDefaults[$key] = $value;	
+					$aDefaults[$key] = $oAppContext->GetCurrentValue($key);	
 				}
 				// Set all the default values in an object and clone this "default" object
 				$oObjToClone = MetaModel::NewObject($sRealClass);
diff --git a/pages/UniversalSearch.php b/pages/UniversalSearch.php
index 3c09a2bd0..2cd24d5d5 100644
--- a/pages/UniversalSearch.php
+++ b/pages/UniversalSearch.php
@@ -33,10 +33,8 @@ require_once('../application/loginwebpage.class.inc.php');
 LoginWebPage::DoLogin(true); // Check user rights and prompt if needed (must be admin)
 
 $oAppContext = new ApplicationContext();
-$iActiveNodeId = utils::ReadParam('menu', -1);
-$currentOrganization = utils::ReadParam('org_id', '');
 
-$oP = new iTopWebPage(Dict::S('UI:UniversalSearchTitle'), $currentOrganization);
+$oP = new iTopWebPage(Dict::S('UI:UniversalSearchTitle'));
 
 // From now on the context is limited to the the selected organization ??
 
diff --git a/pages/audit.php b/pages/audit.php
index 28310122f..48b951837 100644
--- a/pages/audit.php
+++ b/pages/audit.php
@@ -28,14 +28,13 @@ try
 	require_once('../application/itopwebpage.class.inc.php');
 	
 	require_once('../application/startup.inc.php');
-	$currentOrganization = utils::ReadParam('org_id', '');
 	$operation = utils::ReadParam('operation', '');
 	$oAppContext = new ApplicationContext();
 	
 	require_once('../application/loginwebpage.class.inc.php');
 	LoginWebPage::DoLogin(); // Check user rights and prompt if needed
 	
-	$oP = new iTopWebPage(Dict::S('UI:Audit:Title'), $currentOrganization);
+	$oP = new iTopWebPage(Dict::S('UI:Audit:Title'));
 	
 	function GetRuleResultSet($iRuleId, $oDefinitionFilter)
 	{
diff --git a/pages/csvimport.php b/pages/csvimport.php
index 28e3fc89a..c924cb32d 100644
--- a/pages/csvimport.php
+++ b/pages/csvimport.php
@@ -35,10 +35,9 @@ try
 	LoginWebPage::DoLogin(); // Check user rights and prompt if needed
 	
 	$oAppContext = new ApplicationContext();
-	$currentOrganization = utils::ReadParam('org_id', 1);
 	$iStep = utils::ReadParam('step', 1);
 	
-	$oPage = new iTopWebPage(Dict::S('UI:Title:BulkImport'), $currentOrganization);
+	$oPage = new iTopWebPage(Dict::S('UI:Title:BulkImport'));
 	
 	/**
 	 * Helper function to build a select from the list of valid classes for a given action
diff --git a/pages/navigator.php b/pages/navigator.php
index 0d543a9db..6225384b0 100755
--- a/pages/navigator.php
+++ b/pages/navigator.php
@@ -27,10 +27,8 @@ LoginWebPage::DoLogin(); // Check user rights and prompt if needed
 
 $sOperation = utils::ReadParam('operation', 'menu');
 $oAppContext = new ApplicationContext();
-$iActiveNodeId = utils::ReadParam('menu', -1);
-$currentOrganization = utils::ReadParam('org_id', '');
 
-$oP = new iTopWebPage("iTop - Navigator", $currentOrganization);
+$oP = new iTopWebPage("iTop - Navigator");
 
 // Main program
 $sClass = utils::ReadParam('class', '');
diff --git a/pages/run_query.php b/pages/run_query.php
index 4bea654a3..dba1e7d88 100644
--- a/pages/run_query.php
+++ b/pages/run_query.php
@@ -91,10 +91,8 @@ function ShowExamples($oP, $sExpression)
 
 $sOperation = utils::ReadParam('operation', 'menu');
 $oAppContext = new ApplicationContext();
-$iActiveNodeId = utils::ReadParam('menu', -1);
-$currentOrganization = utils::ReadParam('org_id', '');
 
-$oP = new iTopWebPage(Dict::S('UI:RunQuery:Title'), $currentOrganization);
+$oP = new iTopWebPage(Dict::S('UI:RunQuery:Title'));
 
 // Main program
 $sExpression = utils::ReadParam('expression', '');
diff --git a/pages/schema.php b/pages/schema.php
index 94af2cf00..fb3367bb0 100644
--- a/pages/schema.php
+++ b/pages/schema.php
@@ -507,11 +507,9 @@ function DisplayRelationDetails($oPage, $sRelCode)
 
 // Display the menu on the left
 $oAppContext = new ApplicationContext();
-$iActiveNodeId = utils::ReadParam('menu', -1);
-$currentOrganization = utils::ReadParam('org_id', 1);
 $operation = utils::ReadParam('operation', '');
 
-$oPage = new iTopWebPage(Dict::S('UI:Schema:Title'), $currentOrganization);
+$oPage = new iTopWebPage(Dict::S('UI:Schema:Title'));
 $oPage->no_cache();
 
 $operation = utils::ReadParam('operation', '');