#coolmenu{
width: 100%;
background-color: transparent;
}

* html #coolmenu{ /*IE only rule, to negate the padding below IE includes in menu width.*/
width: 100%;
}

#coolmenu a{
font: bold 13px Comic Sans MS;
padding: 3px;
padding-left: 5px;
display: block;
width: 100%;
color: #FFFF99;
}

html>body #coolmenu a{ /*Non IE rule*/
width: auto;
}

#coolmenu a:hover{
background-color: green;
color: black;
}