function getCookie(c_name) {
	if (document.cookie.length>0)
	  {
	  c_start=document.cookie.indexOf(c_name + "=")
	  if (c_start!=-1)
		{ 
		c_start=c_start + c_name.length+1 
		c_end=document.cookie.indexOf(";",c_start)
		if (c_end==-1) c_end=document.cookie.length
		return unescape(document.cookie.substring(c_start,c_end))
		} 
	  }
	return ""
}

function setCookie( name, value, path, expires, domain, secure ) {
	// set time, it's in milliseconds
	var today = new Date();
	today.setTime( today.getTime() );
	
	/*
	if the expires variable is set, make the correct 
	expires time, the current script below will set 
	it for x number of days, to make it for hours, 
	delete * 24, for minutes, delete * 60 * 24
	*/
	if ( expires )
	{
	expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );
	
	document.cookie = name + "=" +escape( value ) +
	( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) + 
	( ( path ) ? ";path=" + path : "" ) + 
	( ( domain ) ? ";domain=" + domain : "" ) +
	( ( secure ) ? ";secure" : "" );
}

function setStateLevel(curPageID, navLevel) {
	var curLevel = getCookie('level' + navLevel);
	
	if (curLevel == curPageID) {
		setNavDisplay(curPageID, navLevel);
	}
}

function setHighlightClass(headerName) {
	if (document.all) {
		document.all(headerName).className = 'selected';
	}
	else {
		document.getElementById(headerName).className = 'selected';
	}
}

function setNavDisplay(headerName, navLevel){
	var divName = 'div_' + headerName;
	
	// toggle navigation elements display between visible and hidden
	if(document.all){
		if (document.all(divName).style.display == 'none') {
			document.all(divName).style.display = '';
			setCookie('level' + navLevel, headerName, '/');
			}
		else {
			document.all(divName).style.display = 'none';
			setCookie('level' + navLevel, '', '/');
			}
	}
	else if(document.getElementById){
		if (document.getElementById(divName).style.display == 'none') {
			document.getElementById(divName).style.display = '';
			setCookie('level' + navLevel, headerName, '/');
			}
		else {
			document.getElementById(divName).style.display = 'none';
			setCookie('level' + navLevel, '', '/');
			}
	}
}

function eatAllLevelCookies(navLevel) {
	for(i=navLevel; i<11; i++){ 
		setCookie('level' + i,'','/');
	}
}

function setTopLevelClass(headerName){
	if(document.all){
		if (document.all('div_' + headerName).style.display == 'none') {
			document.all('a_' + headerName).className ='';
			}
		else {
			document.all('a_' + headerName).className ='selected';
			}
	}
	else if(document.getElementById){
		if (document.getElementById('div_' + headerName).style.display == 'none') {
			document.getElementById('a_' + headerName).className ='';
			}
		else {
			document.getElementById('a_' + headerName).className ='selected';
			}
	}

}