diff --git a/content/fasoverlay.js.php b/content/fasoverlay.js.php
index e8078eb48..6fbfb0efa 100644
--- a/content/fasoverlay.js.php
+++ b/content/fasoverlay.js.php
@@ -23,10 +23,15 @@
 require_once('../config/vilesci.config.inc.php');
 require_once('../include/functions.inc.php');
 require_once('../include/variable.class.php');
+require_once('../include/benutzer.class.php');
+
+$user = get_uid();
 
 $variable = new variable();
-$variable->loadVariables(get_uid());
-if(false): ?> <script type="text/javascript"> <?php endif;
+$variable->loadVariables($user);
+
+$benutzer = new benutzer();
+$benutzer->load($user);
 ?>
 
 var currentAuswahl=new auswahlValues();
@@ -1191,14 +1196,17 @@ function MessageNew()
 {
 	var tree = document.getElementById('student-tree');
 
-	if(tree.currentIndex==-1)
+	if (tree.currentIndex == -1)
 	{
 		alert("Bitte markieren Sie zuerst eine Person");
 	}
 	else
 	{
-		var person_id = getTreeCellText(tree, 'student-treecol-person_id', tree.currentIndex);
-		window.open('<?php echo APP_ROOT ?>/index.ci.php/system/Messages/outbox/'+person_id,'Outbox','');
+		var prestudentIdArray = getMultipleTreeCellText(tree, 'student-treecol-prestudent_id');
+		
+		var action = '<?php echo APP_ROOT ?>index.ci.php/system/Messages/write/' + <?php echo $benutzer->person_id; ?>;
+		
+		openWindowPostArray(action, 'prestudent_id', prestudentIdArray);
 	}
 }
 
diff --git a/content/functions.js.php b/content/functions.js.php
index 0b46c2aa3..3789e505b 100644
--- a/content/functions.js.php
+++ b/content/functions.js.php
@@ -261,6 +261,55 @@ function getTreeCellText(tree, col, idx)
 	return tree.view.getCellText(idx, col);
 }
 
+/**
+ * Like getTreeCellText, but returns all the selected values (= cooler!)
+ * @param: tree
+ * @param: col
+ */
+function getMultipleTreeCellText(tree, col)
+{
+	var start = new Object();
+	var end = new Object();
+	var numRanges = tree.view.selection.getRangeCount();
+	var returnArray = new Array();
+
+	for (var t = 0; t < numRanges; t++)
+	{
+		tree.view.selection.getRangeAt(t, start, end);
+		for (var v = start.value; v <= end.value; v++)
+		{
+			returnArray.push(getTreeCellText(tree, col, v));
+		}
+	}
+	
+	return returnArray;
+}
+
+/**
+ * Create a window with a form inside and a hidden input for each element of the given array
+ * @param: action
+ * @param: dataName
+ * @param: data
+ */
+function openWindowPostArray(action, dataName, data)
+{
+	var FORM_HEAD = "<form id='postform-form' name='postfrm' action='' method='POST'>\n";
+	var FORM_FOOT = "</form>";
+	
+	var inputsHidden = "";
+	
+	for (var i = 0; i < data.length; i++)
+	{
+		inputsHidden += "	<input type='hidden' name='" + dataName + "[]' value='" + data[i] + "' />\n";
+	}
+	
+	var newwindow = window.open("", "FAS");
+	newwindow.document.getElementsByTagName('body')[0].innerHTML = FORM_HEAD + inputsHidden + FORM_FOOT;
+	newwindow.document.getElementById('postform-form').action = action;
+	
+	newwindow.document.postfrm.submit();
+}
+
 // ****
 // * Trim Member Function fuer Strings
 // ****
diff --git a/content/messages.js.php b/content/messages.js.php
index 2f21bc125..be39d3a73 100644
--- a/content/messages.js.php
+++ b/content/messages.js.php
@@ -93,7 +93,20 @@ function loadMessages(person_id, fas_person_id)
 // ****
 function MessagesNewMessage()
 {
-	window.open('<?php echo APP_ROOT ?>index.ci.php/system/Messages/write/'+MessageSenderPersonID+'/'+MessagePersonID,'Message','');
+	var tree = parent.document.getElementById('student-tree');
+
+	if (tree.currentIndex == -1)
+	{
+		alert("Bitte markieren Sie zuerst eine Person");
+	}
+	else
+	{
+		var prestudentIdArray = getMultipleTreeCellText(tree, 'student-treecol-prestudent_id');
+		
+		var action = '<?php echo APP_ROOT ?>index.ci.php/system/Messages/write/' + MessageSenderPersonID;
+		
+		openWindowPostArray(action, 'prestudent_id', prestudentIdArray);
+	}
 }
 
 /**