var slideshow_speed = 5000;
var slideshow_running = true;
var active_slide = 0;

jQuery(document).ready(function(){      
    //get slideshow on home page
    if(jQuery('#header-img img').size()>1){   	
    	var slideshow_on = window.setInterval(runSlide,slideshow_speed);
    }
});

function runSlide(){
	if(slideshow_running){
		slideshow_running = false;
		var nextSlide = active_slide + 1;
		if(nextSlide>=jQuery('#header-img img').size()){
			nextSlide = 0;
		}
		jQuery('#header-img img:eq('+active_slide+')').fadeOut(500,function(){
			jQuery('#header-img img:eq('+nextSlide+')').fadeIn(500,function(){
				slideshow_running = true;
				active_slide++;
				if(active_slide>=jQuery('#header-img img').size()){
					active_slide = 0;
				}
			});
		});
	}
}