// function setNavigationTab
// contentSection is passed to this function in the onLoad command in the body tag
// this function highlights the appropriate top navigation tab

function setNavigationTab(contentSection) {
	var topMenuObj = document.getElementById(contentSection);
	topMenuObj.className = "selected";

// if the "admin" tab exists (you have the logged-in admin toolbar)
// turn off the appropriate seperator images, highlight appropriate corner when necessary
	if (document.getElementById('navItem_admin')){
		switch (contentSection){
			case "navItem_admin":
				topMenuObj.className = "leftCornerSelect selected tabNavLeftCorner";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_admin');
				topMenuSeperatorObj.style.background = "none";
				break;
			case "navItem_trainings":
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_admin');
				topMenuSeperatorObj.style.background = "none";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_trainings');
				topMenuSeperatorObj.style.background = "none";
				break;
			case "navItem_account":
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_trainings');
				topMenuSeperatorObj.style.background = "none";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_account');
				topMenuSeperatorObj.style.background = "none";
				break;
			case "navItem_feedback":
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_loginout');
				topMenuSeperatorObj.style.background = "none";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_feedback');
				topMenuSeperatorObj.style.background = "none";
				break;
			case "navItem_help":
				topMenuObj.className = "selected tabNavRightCorner rightCornerSelect";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_feedback');
				topMenuSeperatorObj.style.background = "none";
				break;		
		}
	}
// if the "admin" tab DOES NOT exist AND the "My Account" tab DOES exist (you have the logged-in training toolbar)
// turn off the appropriate seperator images, highlight appropriate corner when necessary
	else if (!(document.getElementById('navItem_admin')) && document.getElementById('navItem_account')){
		switch (contentSection){
			case "navItem_trainings":
				topMenuObj.className = "leftCornerSelect selected tabNavLeftCorner";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_trainings');
				topMenuSeperatorObj.style.background = "none";
				break;
			case "navItem_account":
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_trainings');
				topMenuSeperatorObj.style.background = "none";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_account');
				topMenuSeperatorObj.style.background = "none";
				break;
			case "navItem_feedback":
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_loginout');
				topMenuSeperatorObj.style.background = "none";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_feedback');
				topMenuSeperatorObj.style.background = "none";
				break;
			case "navItem_help":
				topMenuObj.className = "selected tabNavRightCorner rightCornerSelect";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_feedback');
				topMenuSeperatorObj.style.background = "none";
				break;	
		}
	}
// otherwise, you have not logged in
// turn off the appropriate seperator images, highlight appropriate corner when necessary
	else {
		switch (contentSection){
			case "navItem_loginout":
				topMenuObj.className = "leftCornerSelect selected tabNavLeftCorner";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_loginout');
				topMenuSeperatorObj.style.background = "none";
				break;
			case "navItem_feedback":
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_loginout');
				topMenuSeperatorObj.style.background = "none";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_feedback');
				topMenuSeperatorObj.style.background = "none";
				break;
			case "navItem_help":
				topMenuObj.className = "selected tabNavRightCorner rightCornerSelect";
				var topMenuSeperatorObj = document.getElementById('navItemSeperator_feedback');
				topMenuSeperatorObj.style.background = "none";
				break;	
		}
	}
}