.WygwamMenu{position:absolute;left: 425px;top:127px;z-index: 100;}
.WygwamMenu .WygwamMenu ul.AspNet-Menu{width:100%;} /* Avec les modifications, on définit juste la taille. Le reste se fait tout seul :D */

.WygwamMenu ul.AspNet-Menu{position: relative;}
.WygwamMenu ul.AspNet-Menu, 
.WygwamMenu ul.AspNet-Menu ul{margin: 0;padding: 0;display: block;}
.WygwamMenu ul.AspNet-Menu li{position:relative;list-style:none;float:left;height:30px;margin:0 5px;padding:0;}
.WygwamMenu ul.AspNet-Menu li a,
.WygwamMenu ul.AspNet-Menu li span{text-decoration: none;}
.WygwamMenu ul.AspNet-Menu ul{width:150px;position:absolute;display:none;}
.WygwamMenu ul.AspNet-Menu ul li{margin:0;height:30px;width:100%;}
.WygwamMenu ul.AspNet-Menu ul li a,
.WygwamMenu ul.AspNet-Menu ul li span{display: block;}

/* Add more rules here if your menus have more than three (3) tiers */
.WygwamMenu ul.AspNet-Menu li:hover ul ul,
.WygwamMenu ul.AspNet-Menu li:hover ul ul ul,
.WygwamMenu ul.AspNet-Menu li:hover ul ul ul ul,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover ul ul,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover ul ul ul,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover ul ul ul ul{display:none;}

/* Add more rules here if your menus have more than three (3) tiers */
.WygwamMenu ul.AspNet-Menu li:hover ul,
.WygwamMenu ul.AspNet-Menu li li:hover ul,
.WygwamMenu ul.AspNet-Menu li li li:hover ul,
.WygwamMenu ul.AspNet-Menu li li li li:hover ul,
.WygwamMenu ul.AspNet-Menu li li li li li:hover ul,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover ul,
.WygwamMenu ul.AspNet-Menu li li.AspNet-Menu-Hover ul,
.WygwamMenu ul.AspNet-Menu li li li.AspNet-Menu-Hover ul,
.WygwamMenu ul.AspNet-Menu li li li li.AspNet-Menu-Hover ul,
.WygwamMenu ul.AspNet-Menu li li li li li.AspNet-Menu-Hover ul{display:block;z-index:1;border:#e9e9e9 1px solid;}

.WygwamMenu ul.AspNet-Menu ul{width:150px;top:30px;left:0;background:White;}
.WygwamMenu ul.AspNet-Menu ul ul{top:-1px;left:100%;}

/* list items being hovered over */
.WygwamMenu ul.AspNet-Menu li:hover,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover{background:none;}

/* all anchors and spans (nodes with no link) */
.WygwamMenu ul.AspNet-Menu a, 
.WygwamMenu ul.AspNet-Menu span{line-height:30px;color:#63aecd;padding:0 10px;}

/* leaves */
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Leaf a, 
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Leaf span{background-image: none !important;}

/* hovered text */
html>body .WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover a,
html>body .WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover span,
{color:#4890bc;background:#e9f8ff url(Images/Menu/activeArrowRight.gif) right center no-repeat;}

.WygwamMenu ul.AspNet-Menu li:hover li:hover a,
.WygwamMenu ul.AspNet-Menu li:hover li:hover span,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li.AspNet-Menu-Hover a,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li.AspNet-Menu-Hover span,
.WygwamMenu ul.AspNet-Menu li:hover li:hover li:hover a,
.WygwamMenu ul.AspNet-Menu li:hover li:hover li:hover span,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li.AspNet-Menu-Hover li.AspNet-Menu-Hover a,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li.AspNet-Menu-Hover li.AspNet-Menu-Hover span,
.WygwamMenu ul.AspNet-Menu li:hover li:hover li:hover li:hover a,
.WygwamMenu ul.AspNet-Menu li:hover li:hover li:hover li:hover span,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li.AspNet-Menu-Hover li.AspNet-Menu-Hover li.AspNet-Menu-Hover a,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li.AspNet-Menu-Hover li.AspNet-Menu-Hover li.AspNet-Menu-Hover span
{color:#4890bc;background:#e9f8ff url(Images/Menu/activeArrowRight.gif) right center no-repeat;}

/* the tier above this one is hovered */
.WygwamMenu ul.AspNet-Menu li:hover li a, 
.WygwamMenu ul.AspNet-Menu li:hover li span,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li a,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li span,
.WygwamMenu ul.AspNet-Menu li:hover li:hover li a,
.WygwamMenu ul.AspNet-Menu li:hover li:hover li span,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li.AspNet-Menu-Hover li a,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li.AspNet-Menu-Hover li span,
.WygwamMenu ul.AspNet-Menu li:hover li:hover li:hover li a,
.WygwamMenu ul.AspNet-Menu li:hover li:hover li:hover li span,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li.AspNet-Menu-Hover li.AspNet-Menu-Hover li a,
.WygwamMenu ul.AspNet-Menu li.AspNet-Menu-Hover li.AspNet-Menu-Hover li.AspNet-Menu-Hover li span
{color:#4890bc;background: transparent url(Images/Menu/arrowRight.gif) right center no-repeat;}