function init_rollover() {
	var rollAction = document.getElementsByTagName('div');
	for (var i=0; i<rollAction.length; i++) {
		var e = rollAction[i];
		if (e.className == 'segOff') {
		e.onmouseover = function () {this.className='segOver';}
		e.onmouseout = function () {this.className='segOff';}
		}
	}
}