diff --git a/TODO b/TODO
index e9e983a8..1019f2b7 100644
--- a/TODO
+++ b/TODO
@@ -9,3 +9,4 @@
 * caching all but parts of the template
 * change plugins so $smarty variable always comes first
 * being able to load config files from PHP scripts
+* get cache ttl with function call
diff --git a/libs/plugins/function.eval.php b/libs/plugins/function.eval.php
index bce9dc7f..c1d7a116 100644
--- a/libs/plugins/function.eval.php
+++ b/libs/plugins/function.eval.php
@@ -12,8 +12,8 @@ function smarty_function_eval($params, &$this)
 {
     extract($params);
 
-    if (empty($var)) {
-        $this->trigger_error("assign: missing 'var' parameter");
+    if (!isset($var)) {
+        $this->trigger_error("eval: missing 'var' parameter");
         return;
     }
 
diff --git a/libs/plugins/function.popup_init.php b/libs/plugins/function.popup_init.php
index c5d3cd44..d653d6df 100644
--- a/libs/plugins/function.popup_init.php
+++ b/libs/plugins/function.popup_init.php
@@ -10,8 +10,14 @@
  */
 function smarty_function_popup_init($params, &$smarty)
 {
+	$zindex = 1000;
+	
+    if (!empty($params['zindex'])) {
+		$zindex = $params['zindex'];
+	}
+	
     if (!empty($params['src'])) {
-    	echo '<div id="overDiv" style="position:absolute; visibility:hidden; z-index:1000;"></div>'."\n";
+    	echo '<div id="overDiv" style="position:absolute; visibility:hidden; z-index:'.$zindex.';"></div>'."\n";
         echo '<script language="JavaScript" src="'.$params['src'].'"></script>'."\n";
     } else {
         $smarty->trigger_error("popup_init: missing src parameter");
diff --git a/plugins/function.eval.php b/plugins/function.eval.php
index bce9dc7f..c1d7a116 100644
--- a/plugins/function.eval.php
+++ b/plugins/function.eval.php
@@ -12,8 +12,8 @@ function smarty_function_eval($params, &$this)
 {
     extract($params);
 
-    if (empty($var)) {
-        $this->trigger_error("assign: missing 'var' parameter");
+    if (!isset($var)) {
+        $this->trigger_error("eval: missing 'var' parameter");
         return;
     }
 
diff --git a/plugins/function.popup_init.php b/plugins/function.popup_init.php
index c5d3cd44..d653d6df 100644
--- a/plugins/function.popup_init.php
+++ b/plugins/function.popup_init.php
@@ -10,8 +10,14 @@
  */
 function smarty_function_popup_init($params, &$smarty)
 {
+	$zindex = 1000;
+	
+    if (!empty($params['zindex'])) {
+		$zindex = $params['zindex'];
+	}
+	
     if (!empty($params['src'])) {
-    	echo '<div id="overDiv" style="position:absolute; visibility:hidden; z-index:1000;"></div>'."\n";
+    	echo '<div id="overDiv" style="position:absolute; visibility:hidden; z-index:'.$zindex.';"></div>'."\n";
         echo '<script language="JavaScript" src="'.$params['src'].'"></script>'."\n";
     } else {
         $smarty->trigger_error("popup_init: missing src parameter");