MACROMEDIA FLASH 8-ACTIONSCRIPT 2.0 LANGUAGE Reference page 126

Example
Create an ActionsScript file named ApplyThis.as and then enter the following code:
class ApplyThis {
var str:String = "Defined in ApplyThis.as";
function conctStr(x:String):String {
return x+x;
}
function addStr():String {
return str;
}
}
Then, in a FLA or a separate ActionScript file, add the following code
var obj:ApplyThis = new ApplyThis();
var abj:ApplyThis = new ApplyThis();
abj.str = "defined in FLA or AS";
trace(obj.addStr.call(abj, null)); //output: defined in FLA or AS
trace(obj.addStr.call(this, null)); //output: undefined
trace(obj.addStr.call(obj, null)); //output: Defined in applyThis.as
Similarly, to call a function defined in a dynamic class, you must use
function in the proper scope:
// incorrect version of Simple.as
/*
dynamic class Simple {
function callfunc() {
trace(func());
}
}
*/
// correct version of Simple.as
dynamic class simple {
function callfunc() {
trace(this.func());
}
}
Inside the FLA or a separate ActionScript file, add the following code:
var obj:Simple = new Simple();
obj.num = 0;
obj.func = function() {
return true;
};
obj.callfunc();
// output: true
The above code works when you use
syntax error if you used the incorrect version of Simple.as, which was commented out in the
above example.
126 ActionScript language elements
in the callfunc() method. However you would get a
this
to invoke the
this