function mainmenu(){$(" #barre_menu .bloc_menu ").css({display:"none"});$(" #barre_menu li").hover(function(){$(this).find('.bloc_menu:first').css({visibility:"visible",display:"none"}).show(400)},function(){$(this).find('.bloc_menu:first').css({visibility:"hidden"})})}
$(document).ready(function(){mainmenu()});