Set a variable with an element's position and use it to trigger an event

Hi Edge-Heads,

I want to use the position of a draggable object to trigger another object to hide/show.

I have tried setting up a variable using jquery .position() and then testing that variable.

This is in compositionReady;

var pos = ("draggable").position();

if (pos >= 850) {

     sym.$("obj1").hide();

     sym.$("obj2").show();

}

This does not appear to work...

Thanks,

Justin