.topmenu { margin-top:3px; float:right; width: 530px; }
@media screen and (-webkit-min-device-pixel-ratio:0) 
{
   .topmenu { margin-top:3px; float:left; width: 550px; }
}

.topmenusub { margin-right:7px; margin-bottom:11px; float:right; width: 530px; }
@media screen and (-webkit-min-device-pixel-ratio:0) 
{
   .topmenusub { margin-top:1px; margin-right:7px; margin-bottom:11px; float:right; width: 550px;}
}