function backButtonTest()
        {
            try
            {
            
                var mod = document.forms[0].ctl00$ctl00$PageBody$PageBody$hidSubModified.value;
                
                if (mod == "true")
                {
                    alert("To revise your seating requests, please click \"OK\" and then click \"Undo\" or \"Remove\" next to the series you would like to modify on this page and start over.");
                    browsername=navigator.appName;
                    if (browsername.indexOf("Microsoft") !=-1)
                    {
                        window.location.href("/SiteCode/Purchase/SubscriptionRenewals.aspx");
                    }
                    else
                    {
                        location.replace("/SiteCode/Purchase/SubscriptionRenewals.aspx");
                    }
        	        return false;
                }
            }
            catch(err){}
        }
        
        function subsModify()
	    {
	        try
	        {
	            document.forms[0].ctl00$ctl00$PageBody$PageBody$hidSubModified.value = "false";
	        }catch(error){}
	    }