$(document).ready(function(){
	$('#diapoSterichem a').hover(
		function() {
			$('#diapoPortail').stop(true,true).animate({backgroundPosition: '(35% 0%)'}, '8000');	
		},
		function() {
			$('#diapoPortail').stop(true,true).animate({backgroundPosition: '(50% 0%)'}, '8000');
		}
	);
	$('#diapoTBM a').hover(
		function() {
			$('#diapoPortail').stop(true,true).animate({backgroundPosition: '(65% 0%)'}, '8000');
		},
		function() {
			$('#diapoPortail').stop(true,true).animate({backgroundPosition: '(50% 0%)'}, '8000');
		}
	);
});