DeveEdge was right, it is screenX and Y...but it's NS specific, and since you said it didn't work, i'm guessing that you have IE. Do some browser checking and branching, and for IE use left and top instead of screenX and Y. good luck.
C G C F A D--Feel the Noise
"When your life goes nowhere and leads back to me, doesn't that tell you something?"
~Gray Area Fury