[stark427]

Ok I found the solution myself.
For anyone who is interested :

replace this :

A:link, A:visited, A:active {
	COLOR: #26354F;
}

with this :

A:link, A:visited, A:active {
	COLOR: #26354F;
        TEXT-DECORATION: none;
}

and

replace this :

A:hover {
	COLOR: #7C8EA7;
}

with this :

A:hover {
	COLOR: #7C8EA7;
        TEXT-DECORATION: underline;
}

The 1st replacement removes the line under the links.

the 2nd replacement will make your links be underlined only when you put the cursor over them.