$(document).ready(function(){
	$("#fileUpload_1_container input").change(function () {
		$("#fileUpload_2_container").addClass("showInput");
	})
	
	$("#fileUpload_2_container input").change(function () {
		$("#fileUpload_3_container").addClass("showInput");
	})
	
	$("#fileUpload_3_container input").change(function () {
		$("#fileUpload_4_container").addClass("showInput");
	})
});