input.button_main {
  background-repeat: no-repeat;  /* make the background image appear only once */
  background-position: 8px 18px;  /* equivalent to 'top left' */
	width: 160px;
	height: 50px;
	text-align: left;
	padding-left: 50px;
	margin: 2px;
}


input.button_inicio_main {
  background-image: url('../iconos/home32.png'); /* 16px x 16px */
  background-position: 8px 10px;  /* equivalent to 'top left' */
}

input.button_postgrados_main {
  background-image: url('../iconos/Doctor-32.png'); /* 16px x 16px */
  background-position: 9px 4px;  /* equivalent to 'top left' */
}

input.button_documentos_main {
  background-image: url('../iconos/linedpaperplus32b.png'); /* 16px x 16px listabco */
  background-position: 12px 12px;  /* equivalent to 'top left' */
}

input.button_comentarios_main {
  background-image: url('../iconos/linedpaperplus32b.png'); /* 16px x 16px */
  background-position: 12px 12px;  /* equivalent to 'top left' */
}

input.button_galeria_main {
  background-image: url('../iconos/camera32b.png'); /* 16px x 16px */
  background-position: 12px 12px;  /* equivalent to 'top left' */
}

input.button_contacto_main {
  background-image: url('../iconos/mail.png'); /* 16px x 16px */
  background-position: 12px 16px;  /* equivalent to 'top left' */
}

input.button_personalbase_main {
  background-image: url('../iconos/Doctor-32.png'); /* 16px x 16px */
  background-position: 12px 12px;  /* equivalent to 'top left' */
}

input.button_sitios_main {
  background-image: url('../iconos/global.png'); /* 16px x 16px */
  background-position: 12px 18px;  /* equivalent to 'top left' */
}

input.button_avisos_main {
  background-image: url('../iconos/info16.png'); /* 16px x 16px */
  background-position: 12px 12px;  /* equivalent to 'top left' */
}