$(document).ready(function(){
	window.setInterval("indexslide()",4000);
	
});

var currentslide = 0;
	

function indexslide() {
	
	var indexslidesnum = $('.indexbox_slide').length-1;
	
	var lastslide = currentslide;
	
	if(currentslide<indexslidesnum) {
	currentslide++;
	} else {
	currentslide = 0;
	}
	
	$('.indexbox_slide:eq('+lastslide+')').fadeOut(1000);
	$('.indexbox_slide:eq('+currentslide+')').fadeIn(1500);
	
}