input[type~="submit"],input[type~="button"],input[type~="reset"]  
{background: transparent url('/bott/vkontakte_knopka.gif');  
border: 1px solid #3b6798;  
color: #fff;  
text-decoration:none;  
text-align:center;  
cursor:pointer;  
padding:5px}  

input[type~="submit"]:hover,input[type~="button"]:hover,input[type~="reset"]:hover  
{text-decoration:none;  
background: transparent url('/bott/vkontakte_knopka2.gif');  
border: 1px solid #3b6798;  
color: #fff;  
text-decoration:none;  
cursor:pointer;  
text-align:center;}