Web Development

window.onbeforeunload = HandleOnClose;
        function HandleOnClose(event) 
        {
            if(currentElement == "" || (!(currentElement.getAttribute("tag")=="DonotCallSaveonLoad")))
            {
                if(divTimer.style.display != 'none')
                {
                    var objWarningMsg = document.getElementById("<%=hdnCloseWOWarning.ClientID %>").value;
                    if(objWarningMsg == "False")
                    {
                        var objconfirm = confirm("you wont be able to open this quiz again, continue?")
                        if(objconfirm == true)
                        {
                            FunctiontoCallSaveData();
                        }
                        else
                        {
                            
                        }
                    }
                    else
                    {
                        FunctiontoCallSaveData();
                    }
                }
                else
                {
                    FunctiontoCallSaveData();
                }
            }
        }

package session.TimerBean;

import javax.annotation.Resource;
import javax.ejb.SessionContext;
import javax.ejb.Stateless;
import javax.ejb.Timeout;
import javax.ejb.Timer;
import javax.ejb.TimerService;
import javax.ejb.TransactionManagement;
import javax.ejb.TransactionManagementType;



/**
 * Session Bean implementation class Timer
 */
@Stateless
@TransactionManagement(TransactionManagementType.BEAN)
public class Timers implements TimerLocal{
	@Resource
	private SessionContext roe;
	private TimerService ts;

    /**
     * Default constructor. 
     */
    public Timers() {
        // TODO Auto-generated constructor stub
    	
    }
    public void TimerB()
    {
    	<big>Timer time = ts.createTimer(6000, null);</big>
    	System.out.println("checking");
   
    }
    
    @Timeout
    public void WorkingTimer(Timer time)
    {
    	System.out.println("Timer Bean is working!!!!");
    }
}

Exception in thread "main" java.lang.NullPointerException
	at session.TimerBean.Timers.TimerB(Timers.java:33)
	at client.session.TimerBean.Client.main(Client.java:12)