/* estilos comunes */
.menu_post {font-family: arial, sans-serif; width:318px; height:100px; position:relative; font-size:11px; z-index:100;}
.menu_post ul li a, .menu_post ul li a:visited {display:block; text-decoration:none; color:#000;width:104px; height:20px; text-align:center; color:#fff; border:1px solid #fff; background:#666; line-height:20px; font-size:11px; overflow:hidden;}
.menu_post ul {padding:0; margin:0; list-style: none;}
.menu_post ul li {float:left; position:relative;}
.menu_post ul li ul {display: none;}

/* specifico para navegadores que no sean IE */
.menu_post ul li:hover a {color:#fff; background:#a1a1a1;}
.menu_post ul li:hover ul {display:block; position:absolute; top:21px; left:0; width:105px;}
.menu_post ul li:hover ul li a.hide_post {background:#a1a1a1; color:#fff;}
.menu_post ul li:hover ul li:hover a.hide_post {background:#a1a1a1; color:#000;}
.menu_post ul li:hover ul li ul {display: none;}
.menu_post ul li:hover ul li a {display:block; background:#ddd; color:#000;}
.menu_post ul li:hover ul li a:hover {background:#a1a1a1; color:#000;}
.menu_post ul li:hover ul li:hover ul {display:block; position:absolute; left:105px; top:0;}
.menu_post ul li:hover ul li:hover ul.left_post {left:-105px;}