input.RequiredInput 
{
        background-image:url('myicons/required.gif');
        background-position:top right;
        background-repeat:no-repeat;
}
input.ValidInput 
{
        background-image:url('myicons/valid.gif');
        background-position:top right;
        background-repeat:no-repeat;
}
textarea.RequiredInput 
{
        background-image:url('myicons/required.gif');
        background-position:top right;
        background-repeat:no-repeat;
}
textarea.ValidInput 
{
        background-image:url('myicons/valid.gif');
        background-position:top right;
        background-repeat:no-repeat;
}