diff --git a/js.php b/js.php
index 90a4025..14e9075 100644
--- a/js.php
+++ b/js.php
@@ -1,7 +1,6 @@
 <?php
 //Change as needed
 $base_path = $_SERVER['DOCUMENT_ROOT'];
-$cache_file = $base_path.'/cache/cache.js';
 
 require('./config/jshrink.php');
 
@@ -34,6 +33,8 @@ $modified = array();
 
 if(isset($groups[$_GET['g']]))
 {
+	$cache_file = $base_path.'/cache/'.$_GET['g'];
+	
 	foreach($groups[$_GET['g']] as $file)
 	{
 		$new_file = realpath($base_path.$file);
@@ -41,6 +42,10 @@ if(isset($groups[$_GET['g']]))
 		$modified[] = filemtime($new_file);
 	}
 }
+else //Nothing to display? Just exit
+{
+	die("You must specify a group that exists");
+}
 
 //Add this page too
 $modified[] = filemtime($base_path."js.php");