Using a variable within a function

1

Hi there;

I having a bit of difficulty with assigning a parameter to a 'RollOver; function within a for loop…The function works fine if i ‘hardcode’ in the parameter, but
if i try to use the var i within the function, it doesnt see it…(code below)
Any ideas on how to pass the variable so the functions ‘sees it’
Any help much appreciated!

 
for (var i=0; i<=arrayAirports.length - 1; i++) {
 
 item = _root.attachMovie("Signal", "Signal" + i, i);
 item._y = arrayCoordsY*;
 item._x = arrayCoordsX*;
 // duplicate airport clips and place them on the stage
 item.signalText.destTitle = arrayAirports*;
 item.signalText._visible = false;
  
  item.onRollOver = function() {
  
  WriteLinks(1);   //This works 
  WriteLinks(i);	//This doesnt!
  
  }  

  this.signalText._visible = true;
  eval("_root.CurvePoint" + this.thisCurve)._visible = true; 
 }
}