//provides a safe getobjectbyid it should work on all browsers > 2.0
function safe_getObjectById(elemID)
{
if (document.all) { obj = document.all(elemID) }
else if (document.getElementById) { obj = document.getElementById(elemID) }
else if (document.layers) { obj = document.layers[elemID] }
return obj;
}



function createCookie(name,value,days)
{
	if (days)
	{
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name)
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++)
	{
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name)
{
	createCookie(name,"",-1);
}


//for roster
var last_opened = 'li_1';
function ss(zz) {
    var node = safe_getObjectById(zz);
    var ll = node.nextSibling.nextSibling;
    if(last_opened) {
        hide_n = safe_getObjectById(last_opened);
		if(hide_n) {
        	hide_n.nextSibling.nextSibling.style.display='none';
		}		
    }
    ll.style.display='block';
	createCookie('roster_opened_div',zz, 0);
    last_opened = zz;
    return false;
}