diff --git a/lcsv.php b/lcsv.php
index c8f694c..a511557 100644
--- a/lcsv.php
+++ b/lcsv.php
@@ -27,6 +27,7 @@ class lcsv
 	var $csvdata;
 	var $str_separator;
 	var $str_newline;
+	var $page_subheader;
 
 	function separator()
 	{
@@ -121,17 +122,19 @@ class lcsv
 	{
 		if($this->csvdata)
 		{
+			$filename=strtolower($this->page_subheader);
+			$filename=ereg_replace("[^a-z0-9]","_",$filename);
 			//header("Content-type: application/csv");
 			header("Content-type: text/x-csv");
-			header("Content-disposition: inline; filename=sfiab_".$this->page_subtitle.".csv");
+			header("Content-disposition: inline; filename=sfiab_".$filename.".csv");
 			header("Content-length: ".strlen($this->csvdata));
 			echo $this->csvdata;
 		}
 	}
 
-	function lcsv($subtitle,$sep=",",$nl="\r\n")
+	function lcsv($subheader,$sep=",",$nl="\r\n")
 	{
-		$this->page_subtitle=$subtitle;
+		$this->page_subheader=$subheader;
 		$this->setSeparator($sep);
 		$this->setNewline($nl);