prova così:

<style>
<!--
A.imglink {
BORDER-RIGHT: #f0f0f0 1px solid; BORDER-TOP: #f0f0f0 1px solid; BORDER-LEFT: #f0f0f0 1px solid; BORDER-BOTTOM: #f0f0f0 1px solid; border-thickness: 1px
}
A.imglink:hover {
BORDER-RIGHT: #000000 1px dashed; BORDER-TOP: #000000 1px dashed; BORDER-LEFT: #000000 1px dashed; BORDER-BOTTOM: #000000 1px dashed; border-thickness: 1px
}
A.imglink:active {
BORDER-RIGHT: #000000 1px dashed; BORDER-TOP: #000000 1px dashed; BORDER-LEFT: #000000 1px dashed; BORDER-BOTTOM: #000000 1px dashed; border-thickness: 1px
}



-->
</style>



e la classe la assegni così:

[img]amarcord.gif[/img]