So I'm working on this script and I get an error I cannot understand. The script it complicated (800+ lines), but here is what it boils down to

Code:

---

var someNamespace = {
 
  getXY : function(event) {
    // do some stuff
  }

  where_Am_I : function(event) {
    // get coordinates
    this.getXY(event);
    // do stuff...
  }

  start_process : function(event) {
    this.where_Am_I(event);
    document.getElementById('foo').onmousemove = this.where_Am_I;
  } 

};

---

Start_process is the function that is called. The first call to getXY works fine, but then I get a "is not a function" error from Firefox and a type error from opera when I move my mouse. Notice that where_Am_I is still being registered as a function, but getXY that is called from within it complains..

Any ideas?