function showMenu(menuName)
{
killAll()
if (menuName != 'navNull')
{document.getElementById(menuName).style.visibility = 'visible';}
}

function killAll()
{
document.getElementById('navOverview').style.visibility = 'hidden';
document.getElementById('navStudents').style.visibility = 'hidden';
document.getElementById('navStaff').style.visibility = 'hidden';
document.getElementById('navParents').style.visibility = 'hidden';
document.getElementById('navGovernors').style.visibility = 'hidden';
document.getElementById('navCommunity').style.visibility = 'hidden';
}
function killAllDelay()
{
setTimeout("killAll()",3000);
}
function navMenuHighlightOn(menuName)
{
document.getElementById(menuName).style.background='#999999';
}
function navMenuHighlightOff(menuName)
{
document.getElementById(menuName).style.background='#c0c0c0';
}


function change_btn(btn)
{
	btn.style.cursor = "hand";
	btn.style.borderRight = "#ffcc99 1px solid";
	btn.style.borderBottom = "#ffcc99 1px solid";
	btn.style.borderLeft = "#ffcc66 1px solid";
	btn.style.borderTop = "#ffcc66 1px solid";
	btn.style.backgroundColor = "#FCFECD";
}

function change_btn_out(btn)
{
	btn.style.cursor = "default";
	btn.style.borderRight = "#104a7b 1px solid";
	btn.style.borderBottom = "#104a7b 1px solid";
	btn.style.borderLeft = "#afc4d5 1px solid";
	btn.style.borderTop = "#afc4d5 1px solid";
	btn.style.backgroundColor = "#d1e9f0";
}