Setting argument defaults for a function?

[zq29]

When creating a function in PHP, you can set default values for arguments within a function like so:
[code]
my_function($name="unknown",$age) {
    echo "Hello, my name is $name, I am $age";
}[/code]

I am trying to do the same for a function in JavaScript, but don't appear to be having much luck - Google isn't being very helpful either...

Thanks guys

[fenway]

Such an option doesn't exist... in fact, I've never seen anything like this.  Generally, it's preferable to simply default the values at the top of the subroutine; so for JS:

[code]function my_function( name, age ) {
  if( name == null ) name = "unknown";
  alert( 'Hello, my name is ' + name + ', I am ' + age );
}[/code]

[zq29]

*Slaps forehead*

I was overlooking the obvious there! Many thanks Fenway :)