var isAuthenticated = true;
var userName = "jj";

function writeButton(loginUrl, logoutUrl, target){
document.write("<a href='http://sso.construction.com/SingleSignOn/Logout.aspx?redirectUrl=");
if (isAuthenticated) {
document.write(logoutUrl);
} else {
document.write(loginUrl);
}document.write("' target='");
document.write(target);
document.write("'><img border=0 src='http://sso.construction.com/SingleSignOn/Images/topnav_logout.gif'></a>");
}