a{
text-decoration:none; 
}
a:hover{text-decoration:underline; }

<style type="text/css">

/*Credits: Dynamic Drive CSS Library */
/*URL: http://www.dynamicdrive.com/style/ */

#blueblock{
width: 250px;
border-right: 1px solid #000;
padding: 0 0 1em 0;
margin-bottom: 1em;
font-family: Verdana;
font-size: 90%;
background-color: #003463;
color: #333;
}

* html #blueblock{ /*IE 6 only */
width: 147px; /*Box model bug: 180px minus all left and right paddings for #blueblock */
}

#blueblock ul{
list-style: none;
margin: 0;
padding: 0;
border: none;
}

#blueblock li {
border-bottom: 1px dotted #CCCCCC;
margin: 0;
}

#blueblock li a{
display: block;
padding: 5px 5px 5px 8px;
border-left: 0px solid #1958b7; /**/
border-right: 0px solid #508fc4;
background-color: #E7F1FA; /*2175bc*/
color: #003463;/*fff*/
text-decoration: none;
width: 100%;
}

html>body #blueblock li a{ /*Non IE6 width*/
width: auto;
}

#blueblock li a:hover{
border-left: 0px solid #003463; /*1c64d1*/
border-right: 0px solid #003463; /*5ba3e0*/
background-color: #003463; /*2586d7*/
color: #fff;
}

</style>