function getRealLeft(el) {
    xPos = el.offsetLeft;
    tempEl = el.offsetParent;
    while (tempEl != null) {
        xPos += tempEl.offsetLeft;
        tempEl = tempEl.offsetParent;
    }
    return xPos;
}

function getRealTop(el) {
    yPos = el.offsetTop;
    tempEl = el.offsetParent;
    while (tempEl != null) {
        yPos += tempEl.offsetTop;
        tempEl = tempEl.offsetParent;
    }
    return yPos;
}
function showObj(obj)
{
	if (bTypeNs) {
		var pObj = (NN4) ? document[obj] : document.getElementById(obj).style;
	} else {
		var pObj = document.all[obj].style;
	}
	pObj.visibility = VISIBLE;
}

function hideObj(obj)
{
	if (bTypeNs) {
		var pObj = (NN4) ? document[obj] : document.getElementById(obj).style;
	} else {
		var pObj = document.all[obj].style;
	}
	pObj.visibility = HIDDEN;
}

function moveObj(obj,oLeft,oTop)
{
	if (bTypeNs) {
		var pObj = (NN4) ? document[obj] : document.getElementById(obj).style;
	} else {
		var pObj = document.all[obj].style;
	}
	pObj.left = oLeft;
	pObj.top = oTop;
	pObj.visibility = VISIBLE;
}
function moveAndHideObj(obj,oLeft,oTop)
{
	if (bTypeNs) {
		var pObj = (NN4) ? document[obj] : document.getElementById(obj).style;
	} else {
		var pObj = document.all[obj].style;
	}
	pObj.left = oLeft;
	pObj.top = oTop;
	pObj.visibility = HIDDEN;
}



// determine browser version
var bTypeNs = (navigator.appName=="Netscape" && parseInt(navigator.appVersion) >= 4);
var NN4 = false;
var NN6 = false;
var IE4 = false;
if (bTypeNs) {
	if (parseInt(navigator.appVersion) < 5) {
		NN4 = true;
	} else {
		NN6 = true;
	}
} else {IE4 = true;}

// determine platform
var isMac = navigator.appVersion.indexOf('Mac') > 0 ? 1 : 0 ;

// setup defaults
var HIDDEN = (NN4) ? 'hide' : 'hidden';
var VISIBLE = (NN4) ? 'show' : 'visible';
var navVersion = parseInt(navigator.appVersion);

function showAlert()
{
alert("To select more than one briefing, hold the 'Ctrl' key down \nand in the briefing list click on as many briefings as you need.");
}