Don't shit pants if 'cwd' isn't a thing or a string.

Added xjs_eval(filename, str)
- notionally for evaluating XJS without immediate write
- if str, returns the evaluated script as a string
- if !str, returns the filename that the script was dumped to
- was a fun idea, but doesn't play well with other scripts
- best used with simple and self-contained xjs

exec/load/xjs.js

 function xjs_compile(filename) {
-	if(cwd != '') {
+	if(typeof cwd == 'string' && cwd != '') {
 		if(filename.search(/^((\/)|([A-Za-z]:[\/\\]))/)==-1)
 			filename=cwd+filename;
 	}
@@ -91,3 +91,29 @@ function xjs_compile(filename) {
 	}
 	return(ssjs_filename);
 }
+
+function xjs_eval(filename, str) {
+	const ssjs = xjs_compile(filename);
+	const f = new File(filename + '.html');
+	if (!f.open('w+', false)) {
+		log(LOG_ERR, "!ERROR " + f.error + " creating " + f.name);
+		return '';
+	}
+	function write(s) {
+		f.write(s);
+	}
+	function writeln(s) {
+		f.writeln(s);
+	}
+	load(ssjs);
+	if (str) {
+		f.rewind();
+		const ret = f.read();
+		f.close();
+		f.remove();
+		return ret;
+	} else {
+		f.close();
+		return filename + '.html';
+	}
+}
\ No newline at end of file