.bg_parallax{
/*	background-attachment:fixed;*/

background-size: cover;	
/*
	transition-property: background-position;
  transition-duration: 0.15s !important;
  transition-timing-function: ease !important;
  transition-property: background-size;
  transition-duration: 0.15s !important;
  transition-timing-function: ease !important;


ease 0.1s originale 
*/

-webkit-transition: background-position 0.3s ease !important, background-size 0.3s ease !important;
-moz-transition: background-position 0.3s ease !important, background-size 0.3s ease !important; 
-o-transition: background-position 0.3s ease !important, background-size 0.3s ease !important; 
transition: background-position 0.3s ease !important, background-size 0.3s ease !important; 



}