$(function(){
	setInterval('changeSlide()',7500);
});

function changeSlide(){
	var totalSlides = $('.image_div').length;
	var currentSlide = $('.currImage');
	
	var nextSlide = currentSlide.next('.image_div');	
	
	if(nextSlide.length > 0){
		nextSlide.addClass('currImage');
		currentSlide.css('z-index',1);
		nextSlide.css('z-index',5);
		currentSlide.removeClass('currImage');
		
		nextSlide.fadeIn(function(){
			currentSlide.hide();										
		});
	}else{
		$('.image_div:first').addClass('currImage');
		currentSlide.css('z-index',1);
		$('.image_div:first').css('z-index',5);
		$('.image_div:first').fadeIn(function(){
			currentSlide.hide();										
		});
	}
}