function checkCookie(id)
{
	var c = document.cookie;
	var loginButton = document.getElementById(id+"Button");
	var loginImage = document.getElementById(id+"Image");
//	var enterImage = document.getElementById(id+"EnterImage");
	var re = new RegExp("ptinfo[0-9]+=[^;]+","gim");
	var m = c.match(re);
	var s = (m) ? m[0] : "";
    s = (s) ? s.split("=")[1] : "";

    if (s == "" || s.toUpperCase() == "NA")
    {
    	//var href = loginButton.href.replace(/forum\.aspx/gi,"login.aspx");
    	//href = href.replace(/pfx/gi,"login");
    	//loginButton.href = href;
    	loginImage.src = "/cm-pdz/images/phys/log_in\.png";
//    	loginImage.style.visibility = "visible";
//    	enterImage.style.visibility = "hidden";
    	var regSpan = document.getElementById(id + "Reg");
    	if (regSpan)
    		regSpan.style.visibility = "visible";
    }
}