Calling a function in a seperate .as file.

I have 1 .fla and 2 .as files. The first .as file is called documentClass and is the document class for the .fla. The second .as file is called tracePrac contains a function that traces a varible in tracePrac.as. I want to know how i call for this function in my documentClass.as code?
tracePrac:

Code:

---

package {
        import flash.display.MovieClip;
        public class tracePrac extends MovieClip {
                public var traceNumber:Number=3245;
                public function tracePrac() {
                        trace(traceNumber);
                }
        }
}

---

documentClass:

Code:

---

package {
        import flash.display.MovieClip;
        public class documentClass extends MovieClip {
                public function documentClass() {
                        tracePrac();
                }
        }
}

---

Thanks for your help
Aaron

Dont worry i figured it out, took a bit of researching but i got there. Little bit surprised some one couldnt take to the time to help. But i guess it always feels better to figure it out my self. Here is the code for any one else learning AS3.
documentClass:

Code:

---

package {
        import flash.display.MovieClip;
        public class documentClass extends MovieClip {
                public var TestClass:testClass;
                public function documentClass() {
                        TestClass = new testClass();
                        TestClass.testTrace();
                }
        }
}

---

testClass:

Code:

---

package {
        import flash.display.MovieClip;
        public class testClass extends MovieClip {
                public var traceNumber:Number=345;
                public function testClass() {
                }
                public function testTrace() {
                        trace(traceNumber);
                }
        }
}

---

Cheers
Aaron

Just declare an object of the class tracePrac in the documentClass and then call its fxn

package
{
import flash.display.MovieClip;
public class documentClass extends MovieClip
{
public var obj:tracePrac ;
public function documentClass()
{
obj= new tracePrac ();
obj.fxn();//any function of the class tracePrac that u want to call from the document class
}
}
}


package
{
import flash.display.MovieClip;
public class tracePrac extends MovieClip

{
public var traceNumber:Number=3245;
public function tracePrac()
{
trace(traceNumber);
}
}
}