public long f5Fun(IntPtr es)
{
long obj = ltf.GetJsParameter(es, 0);
IntPtr exec = ltf.GetGlobalExecState();
long v = ltf.GetJsObjectAttribute(exec, obj, "a");
long xc = ltf.GetJsObjectAttribute(exec, obj, "b");
int i1 = ltf.JsValue2Int(exec, v);
int i2 = ltf.JsValue2Int(exec, xc);
string str = string.Format("alert('a:{0},b:{1}')", i1, i2);
ltf.RunJavaScript(str);
return(ltf.JsUndefined());
}