Invalidate session on tab or window close (not tested!!)

code

/*JS code begins here*/

/*Global js variable to decide whether to call session invalidate function*/

  var validNavigation = false;
		//Called when page loads initially
		jQuery(document).ready(function() {
			//Call to wireupEvents
			wireUpEvents();

		});

		//Function called when the page loads
		function wireUpEvents() {
			window.onbeforeunload= function() {
				if (!validNavigation) {
					/*This JS function calls my managed bean method to invalidate session.*/
					windowCloseJsFunction();
				}
			}


			// Attach the event keypress to exclude the F5 refresh
			jQuery(document).bind('keypress', function(e) {
				if (e.keyCode == 116) {
					alert('116');
					validNavigation = true;
				}
			});

			// Attach the event click for all links in the page
			jQuery("a").bind("click", function() {
				alert('click a');
				validNavigation = true;
			});

			// Attach the event submit for all forms in the page
			jQuery("form").bind("submit", function() {
				alert('form');
				validNavigation = true;
			});

			// Attach the event click for all inputs in the page
			jQuery("input[type=submit]").bind("click", function() {
				alert('input');
				validNavigation = true;
			});

			//Attach button click for all inputs in the page
			jQuery("input[type=button]").bind("click", function() {
				validNavigation = true;
			});

	}

	/*JS code ends here*/