pass dimensions to jQuery mouse functions instead of HTML Element

pass dimensions to jQuery mouse functions instead of HTML Element

I'm developing an image slider. I'd like to be able to trigger functions when the mouse leaves an area, sort of like

$('#someDiv').mouseout or $('#someDiv').mouseleave

except instead of passing the div to the function I have a dimension I'd like to pass to it.

I have box like so:

   --------------- 400 px ------------               
   ______________________
3 |                                     |
0 |                                     |
0 |                                     |
p |                                     |
x |_____________________|


I have calculated the dimensions from the left of the box to 25% of the width of the box to the right (or 100px from the left of the box) and also calculated the height of the box and top offset. I want to be able to say if the mouse leaves those dimensions, run a function.

Can I pass the dimensions and use mouseout or mouseleave? is this possible without using an HTML element?

Thanks