$(function() {
	
	$('.img_collaborateur').hover(function(){
			
			this.src = 'picture/library/w' + path + '/'+(parseInt(this.id)+1)+$(this).attr('format');

	},
		function(){
			this.src = 'picture/library/w' + path + '/'+this.id+$(this).attr('format');
		
			}
	
	);
	
});