var doc = fl.getDocumentDOM();
var lib = doc.library;

function exportAllPNG()
{
	saveFolder = saveFolder.replace( /\\/gi, "/" );
	
	if( saveFolder.lastIndexOf( "/" ) != saveFolder.length - 1 )
		saveFolder += "/";

	var items = lib.items;
	while( items.length )
	{
		exportPNG( items.pop() );
	}
}

function exportPNG( $item )
{
	if( $item.itemType != "bitmap" )
		return;
	
	fl.trace( $item.sourceFilePath.split( "/" ).pop() );
	
	$item.exportToFile( "file:///" + saveFolder + $item.sourceFilePath.split( "/" ).pop() );
	
	return;
}

var saveFolder = prompt( "Insert Folder to save files." );

if( saveFolder != "" )
	exportAllPNG();