$(document).ready(function(){
	//set auto show panel after 3 sec
	panelId = window.setInterval('callPanel()',3000);

	$('#slide2,#slide3,#slide4').css('display', 'none');

	$('#l1,#l2,#l3').click(function(){
		var txt = $(this).attr('id');
		txt = txt.replace('l', '');
		showPanel(txt);
		//stop now
		window.clearInterval(panelId);
	});
});

//store default id on load
var prevId = '1';

//declare function to auto call panel
function callPanel()
{
	var newId = (prevId < 3) ? (parseInt(prevId) +1) : 1;
	showPanel(newId);
}

//declare function to show panel
function showPanel(id)
{
	//change class
	$('#l'+prevId).removeClass('selected').addClass('off');
	$('#l'+id).removeClass('off').addClass('selected');
	
	//show/hide div
	$('#slide'+prevId).hide();
	$('#slide'+id).fadeIn("slow");
	//store default id
	prevId = id;
}