function main() {
	/*screen_hide()*/
	
}


/**
* middle box and main navigation button rollover functions
**/
function over_midbox(e) {
	screen_hide();
	
	var targ = window.event ? window.event.srcElement : e.target;
		targ.onmouseout = screen_hide;
	
	screen_show();
	var txta = document.getElementById("txt_about");
	txta.style.display = "block";
	return 1;
}

function over_met(e) {
	screen_hide();
	var targ = window.event ? window.event.srcElement : e.target;
		targ.onmouseout = screen_hide;
	screen_show();
	var txtm = document.getElementById("txt_met");
		txtm.style.display = "block";
	return 1;
}

function over_fin(e) {
	screen_hide();
	var targ = window.event ? window.event.srcElement : e.target;
		targ.onmouseout = screen_hide;
	screen_show();
	var txtf = document.getElementById("txt_fin");
		txtf.style.display = "block";
	return 1;
}

function screen_show() {
	var mid = document.getElementById("mid_box");
	var central = document.getElementById("central");
	var midb = document.getElementById("mid_border");
	var keyt = document.getElementById("keytip");
	var keyhole = document.getElementById("keyhole");
	
	mid.style.overflow = "visible";
	timg.style.display = "block";
	central.style.display = "none";
	midb.style.display = "none";
	keyt.style.display = "block";
	
	keyhole.style.zIndex = 15;
		
	return 1;
}

function screen_hide() {
	var mid = document.getElementById("mid_box");
	var central = document.getElementById("central");
	var midb = document.getElementById("mid_border");
	var txta = document.getElementById("txt_about");
	var txtf = document.getElementById("txt_fin");
	var txtm = document.getElementById("txt_met");
	var keyt = document.getElementById("keytip");
	
	mid.style.overflow = "visible";
	timg.style.display = "none";
	central.style.display = "block";
	central.style.visibility = "visible";
	midb.style.display = "block";
	midb.style.visibility = "visible";
	txta.style.display = "none";
	txtf.style.display = "none";
	txtm.style.display = "none";
	
	midb.style.zIndex = 12;
	central.style.zIndex = 13;
	keyt.style.zIndex = 14;
	return 1;
}

function key_show(e,num) {
	var targ = window.event ? window.event.srcElement : e.target;
		targ.onmouseout = key_hide;
	var key = document.getElementById("keyhole");
		key.style.backgroundPosition = (-93*num)+'px';
		key.style.display = "block";
	return 1;
}
function key_hide() {
	var key = document.getElementById("keyhole");
		key.style.display = "none";
	return 1;
}
/** end middle rollover functions **/