function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		home_over = newImage("images/home-over.gif");		
		t_home_over = newImage("images/t_home-over.gif");
		t_our_over = newImage("images/t_our-over.gif");
		t_doc_over = newImage("images/t_doc-over.gif");
		t_who_over = newImage("images/t_who-over.gif");
		t_what_over = newImage("images/t_what-over.gif");
		t_contact_over = newImage("images/t_contact-over.gif");
		go_doc_over = newImage("images/go_doc-over.gif");
		m_what_over = newImage("images/m_what-over.gif");
		m_evaluation_over = newImage("images/m_evaluation-over.gif");
		m_reason_over = newImage("images/m_reason-over.gif");
		m_goals_over = newImage("images/m_goals-over.gif");
		m_adhd_over = newImage("images/m_adhd-over.gif");
		m_ld_over = newImage("images/m_ld-over.gif");
		m_autism_over = newImage("images/m_autism-over.gif");
		m_epilepsy_over = newImage("images/m_epilepsy-over.gif");
		m_diabets_over = newImage("images/m_diabets-over.gif");
		m_strokes_over = newImage("images/m_strokes-over.gif");
		m_gdisorders_over = newImage("images/m_gdisorders-over.gif");
		m_retardition_over = newImage("images/m_retardition-over.gif");
		m_bdisorders_over = newImage("images/m_bdisorders-over.gif");
		m_gifted_over = newImage("images/m_gifted-over.gif");
		m_brain_over = newImage("images/m_brain-over.gif");
		m_tumors_over = newImage("images/m_tumors-over.gif");
		go_sub_over = newImage("images/go_sub-over.gif");
		m_intellect_over = newImage("images/m_intellect-over.gif");
		m_academics_over = newImage("images/m_academics-over.gif");
		m_motor_over = newImage("images/m_motor-over.gif");
		m_attention_over = newImage("images/m_attention-over.gif");
		m_executive_over = newImage("images/m_executive-over.gif");
		m_speech_over = newImage("images/m_speech-over.gif");
		m_visuoconsruction_over = newImage("images/m_visuoconsruction-over.gif");
		m_memory_over = newImage("images/m_memory-over.gif");
		m_personality_over = newImage("images/m_personality-over.gif");
		m_adaptive_over = newImage("images/m_adaptive-over.gif");
		preloadFlag = true;
	}
}