Changing input field values programmatically

We are using the jQuery mousewheel plugin(http://plugins.jquery.com/project/mousewheel) to alter the values in the properties sidebar input fields when the user hovers over an input and scrolls the mousewheel. This works well and nice, but Xopus does not seem to notice that the input's value has changed. It seems to trigger only on keyup or keypressed. Is there a way to force Xopus to re-evalute these input fields?

BR // Fredrik

We solved this by tricking Xopus into believing someone pressed a key on the keyboard(only tested in FF):

var evt = document.createEvent('KeyEvents');
evt.initEvent('keyup', true, true);
inputFieldElement.dispatchEvent(evt);