diff --git a/lib/javascript/gflib.js b/lib/javascript/gflib.js
index a570bbb3e..ed57fe443 100644
--- a/lib/javascript/gflib.js
+++ b/lib/javascript/gflib.js
@@ -2,6 +2,9 @@
 
 function Fun(name) {
 	this.name = name;
+	for (var i = 1; i < arguments.length; i++) {
+	    this.setChild(i-1, arguments[i]);
+	}
 }
 Fun.prototype.print = function () { return this.show(0); } ;
 Fun.prototype.show = function (prec) {