function _navItem(id, src, hsrc) {
	this.id = id;
	this.src = src;
	this.hsrc = hsrc;
	//this.sImg = new Image(src);
	//this.hImg = new Image(hsrc);
}
_navItem.prototype.select = function() {
	this.src = this.hsrc;
	document.images[this.id].src = this.src;
}

m_navItems = new Object();
m_navItems[1] = new _navItem('bio','../images/nav_bio_off.gif','../images/nav_bio_on.gif');
m_navItems[2] = new _navItem('press','../images/nav_press_off.gif','../images/nav_press_on.gif');
m_navItems[3] = new _navItem('speechespub','../images/nav_speechespub_off.gif','../images/nav_speechespub_on.gif');
m_navItems[4] = new _navItem('mentoring','../images/nav_mentoring_off.gif','../images/nav_mentoring_on.gif');
m_navItems[5] = new _navItem('techupdates','../images/nav_techupdates_off.gif','../images/nav_techupdates_on.gif');
m_navItems[6] = new _navItem('photos','../images/nav_photos_off.gif','../images/nav_photos_on.gif');
m_navItems[7] = new _navItem('contact','../images/nav_contact_off.gif','../images/nav_contact_on.gif');
m_navItems[8] = new _navItem('home','../images/nav_home_off.gif','../images/nav_home_on.gif');