body {background-color:#000000;background-image:url(http://i45.tinypic.com/wss4s5.png);}

.imgentrar{
background-image:url(http://i85.servimg.com/u/f85/11/45/42/31/entrar10.gif);
background-repeat:no-repeat;
background-attachment:no-fixed;
overflow:auto;
width:183px;
height:89px;}

.imgesquina  {
background-image:url(URL-DE-LA-IMAGEN);
position: fixed;
background-repeat:no-repeat;
background-attachment:no-fixed;
overflow:auto;
right: 0;
bottom: 0;
display: block;
width:***ANCHO***px;
height:*ALTO***px;
}

.logointro{
background-color:#000000;
background-image:url(http://sp3.fotolog.com/photo/51/57/57/guachiimm/banner_1277829062287.jpg);
background-repeat:no-repeat;
background-attachment:no-fixed;
overflow:auto;
width:920px;
height:200px;}

A:link {COLOR: white; TEXT-DECORATION: none}
A:visited {COLOR: white; TEXT-DECORATION: none}
A:active {TEXT-DECORATION: none}
A:hover {COLOR: white; TEXT-DECORATION: underline}