//TOP GLOBAL NAV

var activeNavitem = '';
var blnActive = false;
var timeoutnavitem;

//highlight item on mouseover
function hiliteNavitem1(id){
	document.images['imgB' + id + 'state'].src = '/local_content/header_images/b_' + id + '_on.gif';
	document.getElementById('divB' + id + 'state').style.visibility = 'visible';
	if(id != '0')	document.getElementById('divNav1Hline').style.visibility = 'visible';
	if(activeNavitem != '' && activeNavitem != id) document.getElementById('divB' + activeNavitem + 'state').style.visibility = 'hidden';
}

//lowlight item on mouseout
function loliteNavitem1(id){
	for(i=0;i<5;i++){
		document.getElementById('divB' + i + 'state').style.visibility = 'hidden';
	}
	document.getElementById('divNav1Hline').style.visibility = 'hidden';
	activateNavitem1(activeNavitem);
}

//apply active state according to current site section
function activateNavitem1(id){
	if(id != ''){
		activeNavitem = id;
		document.images['imgB' + activeNavitem + 'off'].src = '/local_content/header_images/b_' + activeNavitem + '_active_off.gif';
		document.images['imgB' + activeNavitem + 'state'].src = '/local_content/header_images/b_' + activeNavitem + '_active_on.gif';
		document.getElementById('divB' + id + 'state').style.visibility = 'visible';
		
		//for removing active cursor on mouseover of main nav elements
		document.getElementById('divB1state').childNodes[0].removeAttribute('href');
		document.getElementById('divB2state').childNodes[0].removeAttribute('href');
		document.getElementById('divB3state').childNodes[0].removeAttribute('href');
		document.getElementById('divB4state').childNodes[0].removeAttribute('href');
	}
}

//show sub-nav div
function shownavitem(id){
	blnActive = true;
	hideallitems(id);
	hiliteNavitem1(id);
	document.getElementById('divB' + id + 'subnav').style.visibility = 'visible';
}

//start to hide sub-nav div
function hidenavitem(){
	clearTimeout(timeoutnavitem);
	blnActive = false;
	timeoutnavitem = setTimeout('hidenavitem2()',2000);
}

//hide sub-nav div if no other sub-nav link is moused over
function hidenavitem2(){
	if(blnActive){
		hideallitems();
	}
}

//force hide of sub-nav divs
function hideallitems(){
	loliteNavitem1();
	for(i=1;i<5;i++){
		document.getElementById('divB' + i + 'subnav').style.visibility = 'hidden';
	}
}