/* --------------------------------------------------- */
/* POP-UP WINDOW */
/* --------------------------------------------------- */
function openwin(URL,theHeight,theWidth,addScroll) {
	var nXpos = (screen.availWidth - theWidth) / 2; 
	var nYpos = (screen.availHeight - theHeight) / 2; 
	var win = window.open(URL, 'popupWin', 'top=' + nYpos + ',left=' + nXpos + ',screenY=' + nYpos + ',screenX=' + nXpos + ',height=' + theHeight + ',width=' + theWidth + 'toolbar=0,scrollbars=' + addScroll + ',location=0,statusbar=0,menubar=0');
	win.focus();
}


/* --------------------------------------- */
/* OPEN EXTERNAL LINKS IN NEW WINDOW */
/* --------------------------------------- */
function externalLinks() { 
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
   var anchor = anchors[i]; 
   if (anchor.getAttribute("href") && 
       anchor.getAttribute("rel") == "external") 
     anchor.target = "_blank"; 
 } 
}

window.onload = externalLinks;



/* --------------------------------------- */
/* SEPARATE FUNCTIONS USED SINCE LAYERS OVERLAP - CAN'T USE TOGGLE */
/* --------------------------------------- */
function m1() {
	document.getElementById('opt1').style.visibility = 'visible';
	document.getElementById('opt1-lvl1').className = 'lvl1-on';
	
	document.getElementById('opt2').style.visibility = 'hidden';
	document.getElementById('opt3').style.visibility = 'hidden';
	document.getElementById('opt4').style.visibility = 'hidden';
	document.getElementById('opt5').style.visibility = 'hidden';
	document.getElementById('opt6').style.visibility = 'hidden';
	
	}

function m2() {
	document.getElementById('opt2').style.visibility = 'visible';
	document.getElementById('opt2-lvl1').className = 'lvl1-on';
	
	document.getElementById('opt1').style.visibility = 'hidden';
	document.getElementById('opt3').style.visibility = 'hidden';
	document.getElementById('opt4').style.visibility = 'hidden';
	document.getElementById('opt5').style.visibility = 'hidden';
	document.getElementById('opt6').style.visibility = 'hidden';
}

function m3() {
	document.getElementById('opt3').style.visibility = 'visible';
	document.getElementById('opt3-lvl1').className = 'lvl1-on';
	
	document.getElementById('opt1').style.visibility = 'hidden';
	document.getElementById('opt2').style.visibility = 'hidden';
	document.getElementById('opt4').style.visibility = 'hidden';
	document.getElementById('opt5').style.visibility = 'hidden';
	document.getElementById('opt6').style.visibility = 'hidden';
}

function m4() {
	document.getElementById('opt4').style.visibility = 'visible';
	document.getElementById('opt4-lvl1').className = 'lvl1-on';
	
	document.getElementById('opt1').style.visibility = 'hidden';
	document.getElementById('opt2').style.visibility = 'hidden';
	document.getElementById('opt3').style.visibility = 'hidden';
	document.getElementById('opt5').style.visibility = 'hidden';
	document.getElementById('opt6').style.visibility = 'hidden';
}

function m5() {
	document.getElementById('opt5').style.visibility = 'visible';
	document.getElementById('opt5-lvl1').className = 'lvl1-on';
	
	document.getElementById('opt2').style.visibility = 'hidden';
	document.getElementById('opt3').style.visibility = 'hidden';
	document.getElementById('opt4').style.visibility = 'hidden';
	document.getElementById('opt1').style.visibility = 'hidden';
	document.getElementById('opt6').style.visibility = 'hidden';
}

function m6() {
	document.getElementById('opt6').style.visibility = 'visible';
	document.getElementById('opt6-lvl1').className = 'lvl1-on';
	
	document.getElementById('opt2').style.visibility = 'hidden';
	document.getElementById('opt3').style.visibility = 'hidden';
	document.getElementById('opt4').style.visibility = 'hidden';
	document.getElementById('opt5').style.visibility = 'hidden';
	document.getElementById('opt1').style.visibility = 'hidden';

}



function m1Hide() {
	document.getElementById('opt1').style.visibility = 'hidden';
	document.getElementById('opt1-lvl1').className = 'lvl1';
}

function m2Hide() {
	var subMenu = document.getElementById('opt2').style.visibility = 'hidden';
	document.getElementById('opt2-lvl1').className = 'lvl1';
}

function m3Hide() {
	var subMenu = document.getElementById('opt3').style.visibility = 'hidden';
	document.getElementById('opt3-lvl1').className = 'lvl1';
}

function m4Hide() {
	var subMenu = document.getElementById('opt4').style.visibility = 'hidden';
	document.getElementById('opt4-lvl1').className = 'lvl1';
}

function m5Hide() {
	var subMenu = document.getElementById('opt5').style.visibility = 'hidden';
	document.getElementById('opt5-lvl1').className = 'lvl1';
}

function m6Hide() {
	var subMenu = document.getElementById('opt6').style.visibility = 'hidden';
	document.getElementById('opt6-lvl1').className = 'lvl1';
}



/* --------------------------------------- */
/* HIDE LAYERS */
/* --------------------------------------- */
function hideMenu(divId) {
	var subMenu = document.getElementById(divId);
	subMenu.style.visibility = 'hidden';
}


/* --------------------------------------- */
/* SHOW LAYERS */
/* --------------------------------------- */
function showMenu(divId) {
	var subMenu = document.getElementById(divId);
	subMenu.style.visibility = 'visible';
	
}