//event to check session time variable declaration
var checkSessionTimeEvent;


//Your timing variables in number of seconds

//total length of session in seconds
var sessionLength = 600; 
//time warning shown (10 = warning box shown 10 seconds before session starts)
var warning = 30;  
//time redirect forced (10 = redirect forced 10 seconds after session ends)     
var forceRedirect = 10; 

//time session started
//var pageRequestTime = new Date();
//pageRequestTime=(parseInt(pageRequestTime))*1000;
/*alert(new Date());
alert(new Date()-pageRequestTime);*/
//session timeout length
var timeoutLength = sessionLength*1000;

//set time for first warning, ten seconds before session expires
var warningTime = timeoutLength - (warning*1000);

//force redirect to log in page length (session timeout plus 10 seconds)
var forceRedirectLength = timeoutLength + (forceRedirect*1000);

//set number of seconds to count down from for countdown ticker
var countdownTime = warning;

//warning dialog open; countdown underway
var warningStarted = false;

function checkSessionTime()
{
	//get time now
	var timeNow = new Date(); 
	
	//event create countdown ticker variable declaration
	var countdownTickerEvent; 	
	
	//difference between time now and time session started variable declartion
	var timeDifference = 0;
	
	timeDifference = timeNow - pageRequestTime;

	
    if (timeDifference >= warningTime && warningStarted === false)
        {            
            //call now for initial dialog box text (time left until session timeout)
            countdownTicker(); 
            
            //set as interval event to countdown seconds to session timeout
            countdownTickerEvent = setInterval("countdownTicker()", 1000);
            
            $('#dialogWarning').dialog('open');
			warningStarted = true;
        }
    else if (timeDifference >= timeoutLength){
    		//close warning dialog box
    	clearServSessions();
            if ($('#dialogWarning').dialog('isOpen')) $('#dialogWarning').dialog('close');
            
            //$("p#dialogText-expired").html(timeDifference);
         //   $('#dialogExpired').dialog('open');
        //    window.location="index.php";
             //clear (stop) countdown ticker
            clearInterval(countdownTickerEvent);
           //alert("timeDifference >= timeoutLength");
           // alert(Math.ceil(timeDifference/1000));
        }
        
    if (timeDifference >= forceRedirectLength)
     	{ 
    	/*alert("forceRedirectLength="+forceRedirectLength);
    	alert("timeDifference="+timeDifference);
    	alert("timeDifference >= forceRedirectLength");*/
    	clearServSessions();
        	//clear (stop) checksession event
            clearInterval(checkSessionTimeEvent);
            //force relocation
          //  window.location="login.php?expired=true";
        }

}

function countdownTicker()
{

	//put countdown time left in dialog box
	$("span#dialogText-warning").html(countdownTime);
	if(countdownTime==0){
		 
		clearServSessions();
		   if ($('#dialogWarning').dialog('isOpen')) $('#dialogWarning').dialog('close');
	      //   window.location="index.php";
             //clear (stop) countdown ticker
            clearInterval(countdownTickerEvent);
	}
	//decrement countdownTime
	countdownTime--;
}
function clearServSessions(){
    $.ajax({
        url: 'ajax.php?action=ajax_actions/clear_login',
        success: function(data) {

        }

   });
}