Javascript referens

if (x > 0)
   {....}
else if (x < 0)
   {....}
else
   {....}

switch (action) {
   case "test" : test(); break;
   case "run" : run(); break;
   default : doNothing();
}

try
{
   ...
}
catch (err)
{
   write(err.description}
}