Mi potreste dire cosa fanno queste dichiarazioni css all'interno della pagina:

IMG.1 {
BORDER-RIGHT: #000000 1px solid; BORDER-TOP: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-BOTTOM: #000000 1px solid
}
IMG.2 {
BORDER-RIGHT: #000000 1px solid; BORDER-TOP: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-BOTTOM: #000000 1px solid
}
IMG.1:hover {
BORDER-RIGHT: #FFFFFF 1px solid; BORDER-TOP: #FFFFFF 1px solid; BORDER-LEFT: #FFFFFF 1px solid; BORDER-BOTTOM: #FFFFFF 1px solid
}
IMG.3 {
BORDER-RIGHT: #FFFFFF 1px solid; BORDER-TOP: #FFFFFF 1px solid; BORDER-LEFT: #FFFFFF 1px solid; BORDER-BOTTOM: #FFFFFF 1px solid
}

INPUT.stilec {
BORDER-RIGHT: #c05d00 1px solid; BORDER-TOP: #c05d00 1px solid; FONT-SIZE: 11px; BACKGROUND: #f8fff5; BORDER-LEFT: #c05d00 1px solid; BORDER-BOTTOM: #c05d00 1px solid; FONT-FAMILY: Verdana, Arial, sans-serif
}
TEXTAREA.stilec {
BORDER-RIGHT: #c05d00 1px solid; BORDER-TOP: #c05d00 1px solid; FONT-SIZE: 11px; BACKGROUND: #f8fff5; BORDER-LEFT: #c05d00 1px solid; BORDER-BOTTOM: #c05d00 1px solid; FONT-FAMILY: Verdana, Arial, sans-serif
}
INPUT.stileFocusc {
BORDER-RIGHT: #990000 1px solid; BORDER-TOP: #990000 1px solid; FONT-SIZE: 11px; BACKGROUND: #f4f6e7; BORDER-LEFT: #990000 1px solid; BORDER-BOTTOM: #990000 1px solid; FONT-FAMILY: Verdana, Arial, sans-serif
}
TEXTAREA.stileFocusc {
BORDER-RIGHT: #990000 1px solid; BORDER-TOP: #990000 1px solid; FONT-SIZE: 11px; BACKGROUND: #f4f6e7; BORDER-LEFT: #990000 1px solid; BORDER-BOTTOM: #990000 1px solid; FONT-FAMILY: Verdana, Arial, sans-serif
}