var state = 'none';
function showhide(layer_ref) {
	if (state == 'block') {
		state = 'none';
	} else {
		state = 'block';
	}
	if (document.all) { //IS IE 4 or 5 (or 6 beta)
		eval( "document.all." + layer_ref + ".style.display = state");
		}
		if (document.layers) { //IS NETSCAPE 4 or below
		document.layers[layer_ref].display = state;
		}
		if (document.getElementById &&!document.all) {
		hza = document.getElementById(layer_ref);
		hza.style.display = state;
	}
}

// Session timeout in seconds
var sessionTimeout = 900;
// Check time every second (in milliseconds)
var timeIntervalID = setInterval('checkTimeout()', 1000);

function checkTimeout()
 {
	 sessionTimeout =sessionTimeout - 1;
	 if (sessionTimeout < 0)
	{
		clearInterval(timeIntervalID)
		window.location.href= 'index.cfm?menu=timeout';
	}
 }