diff --git a/private/lib/media/MediaRendererInterface.php b/private/lib/media/MediaRendererInterface.php
index 577f248..9e1bcbb 100644
--- a/private/lib/media/MediaRendererInterface.php
+++ b/private/lib/media/MediaRendererInterface.php
@@ -2,7 +2,7 @@
 
 interface MediaRendererInterface{
 	
-	public function asText();
-	public function render();
+	public function asText(array $opt = array()) ;
+	public function render(array $opt = array());
 }
 ?>
\ No newline at end of file
diff --git a/private/lib/media/mediaRenderers/MediaHtml5.php b/private/lib/media/mediaRenderers/MediaHtml5.php
index a0555b1..93860d1 100644
--- a/private/lib/media/mediaRenderers/MediaHtml5.php
+++ b/private/lib/media/mediaRenderers/MediaHtml5.php
@@ -7,12 +7,12 @@ class MediaHtml5 implements MediaRendererInterface{
 		$this->code = $code;
 	}
 
-	public function asText(){
+	public function asText(array $opt = array()){
 		return $this->code;
 	}
 	
-	public function render(){
-		echo $this->asText();
+	public function render(array $opt = array()){
+		echo $this->asText($opt);
 	}
 }
 ?>
\ No newline at end of file
diff --git a/private/lib/media/mediaRenderers/MediaImage.php b/private/lib/media/mediaRenderers/MediaImage.php
index 61ac098..1895c4a 100644
--- a/private/lib/media/mediaRenderers/MediaImage.php
+++ b/private/lib/media/mediaRenderers/MediaImage.php
@@ -6,12 +6,16 @@ class MediaImage implements MediaRendererInterface{
 		$this->id = $id;
 	}
 
-	public function asText($size){
+	public function asText(array $opt = array()){
+		$size = "small";
+		if(sizeof($opt)>0 && array_key_exists("size", $opt)){
+			$size = $opt["size"];
+		}
 		return '<img src="'.GUIHandler::getBaseUrl().'getImage.php?id='.$this->id.'&size='.$size.'"/>';
 	}
 	
-	public function render($size = "small"){
-		echo $this->asText($size);
+	public function render(array $opt = array ()){
+		echo $this->asText($opt);
 	}
 }
 ?>
\ No newline at end of file
diff --git a/private/lib/media/mediaRenderers/MediaLocalVideo.php b/private/lib/media/mediaRenderers/MediaLocalVideo.php
index 7e8ee0c..bd5ba78 100644
--- a/private/lib/media/mediaRenderers/MediaLocalVideo.php
+++ b/private/lib/media/mediaRenderers/MediaLocalVideo.php
@@ -7,12 +7,12 @@ class MediaLocalVideo implements MediaRendererInterface{
 		$this->id = $id;
 	}
 
-	public function asText(){
+	public function asText(array $opt = array()){
 		return $this->id;
 	}
 	
-	public function render(){
-		echo $this->asText();
+	public function render(array $opt = array()){
+		echo $this->asText($opt);
 	}
 }
 ?>
\ No newline at end of file
diff --git a/private/lib/media/mediaRenderers/MediaPdf.php b/private/lib/media/mediaRenderers/MediaPdf.php
index 4ad7eb1..1ef3efb 100644
--- a/private/lib/media/mediaRenderers/MediaPdf.php
+++ b/private/lib/media/mediaRenderers/MediaPdf.php
@@ -7,12 +7,12 @@ class MediaPdf implements MediaRendererInterface{
 		$this->id = $model;
 	}
 
-	public function asText(){
+	public function asText(array $opt = array()){
 		return $this->id;
 	}
 	
-	public function render(){
-		echo $this->asText();
+	public function render(array $opt = array()){
+		echo $this->asText($opt);
 	}
 }
 ?>
\ No newline at end of file
diff --git a/private/lib/media/mediaRenderers/MediaYoutube.php b/private/lib/media/mediaRenderers/MediaYoutube.php
index 3397a46..72aa514 100644
--- a/private/lib/media/mediaRenderers/MediaYoutube.php
+++ b/private/lib/media/mediaRenderers/MediaYoutube.php
@@ -7,14 +7,14 @@ class MediaYoutube implements MediaRendererInterface{
 		$this->link = $link;
 	}
 
-	public function asText(){
+	public function asText(array $opt = array()){
 		return '<iframe width="420" height="315"
 			src=\"'.$this->link.'?autoplay=0\">
 			</iframe>';
 	}
 	
-	public function render(){
-		echo $this->asText();
+	public function render(array $opt = array()){
+		echo $this->asText($opt);
 	}
 }
 ?>
\ No newline at end of file