p:droppable onDrop does not allow to change the cursor style

[celin]

Primefaces 2.2.1

<p:droppable onDrop="handleDrop" />

The function is called, but the the cursor does not change.

function handleDrop(event, ui) {
document.body.style.cursor = 'wait';
//some delayed stuff
}

Can anyone help me?