WSignal.C

diff --git src/Wt/WSignal.C src/Wt/WSignal.C
index ca92d96..1486196 100644
--- src/Wt/WSignal.C
+++ src/Wt/WSignal.C
@@ -191,17 +191,17 @@ EventSignalBase::createUserEventCall(const std::string& jsObject,
       result << "','" << eventName << "'";

     if (!arg1.empty()) {
-      result << "," << arg1;
+      result << ",a1";
       if (!arg2.empty()) {
-   result << "," << arg2;
+   result << ",a2";
    if (!arg3.empty()) {
-     result << "," << arg3;
+     result << ",a3";
      if (!arg4.empty()) {
-       result << "," << arg4;
+       result << ",a4";
        if (!arg5.empty()) {
-         result << "," << arg5;
+         result << ",a5";
          if (!arg6.empty()) {
-       result << "," << arg6;
+       result << ",a6";
          }
        }
      }