Passing parameters into hover function

Passing parameters into hover function

I am using jQuery UI hover function, the following code snippet is working but not quite what I want:
 
$('#mainMenu img').hover(mouseIn, mouseO ut);
 
function mouseIn() {
      //.....
}
 
function mouseOut() {
      //.....
}
 
what I want is to pass 'mainMenu' as a parameter into mouseIn and mouseOut functions, so the functions should look like:
 
function mouseIn(menuName) {
      //.....
}
 
function mouseOut(menuName) {
      //.....
}
 
but the following is not working:
 
$('#mainMenu img').hover(mouseIn('mainMenu'), mouseO ut('mainMenu'));
 
How do I accomplish this?
 
TIA