var interTime = 2000;
var showIndex = 0;
var interCount = 0;

function showImg(){
	showIndex ++ ;
	if(showIndex >= interCount){
		showIndex = 0;
	}
	$('.client_imgClass').filter(":visible").fadeOut(500).parent().children().eq(showIndex).fadeIn(1000);	
}

$(document).ready(function(){
	interCount = $('.client_imgClass').length;
	$('.client_imgClass').eq(0).show();
	window.setInterval("showImg()",interTime);
});