a { target:_top; }

.main { display:inline-block; width:116px; height:40px; background-image:url('/buttons/maina.png'); }
.main:hover { background-image:url('/buttons/maingo.png'); }
.main:active { background-image:url('/buttons/mainsel.png'); }

.computers { display:inline-block; width:116px; height:40px; background-image:url('/buttons/computersa.png'); }
.computers:hover { background-image:url('/buttons/computersgo.png'); }
.computers:active { background-image:url('/buttons/computerssel.png'); }

.stream { display:inline-block; width:116px; height:40px; background-image:url('/buttons/livea.gif'); }
.stream:hover { background-image:url('/buttons/livego.gif'); }
.stream:active { background-image:url('/buttons/livesel.gif'); }

.guicentral { display:inline-block; width:116px; height:40px; background-image:url('/buttons/guicentrala.gif'); }
.guicentral:hover { background-image:url('/buttons/guicentralgo.gif'); }
.guicentral:active { background-image:url('/buttons/guicentralsel.gif'); }

.mathml { display:inline-block; width:116px; height:40px; background-image:url('/buttons/mathmla.png'); }
.mathml:hover { background-image:url('/buttons/mathmlgo.png'); }
.mathml:active { background-image:url('/buttons/mathmlsel.png'); }

.numctch { display:inline-block; width:116px; height:40px; background-image:url('/buttons/numctcha.gif'); }
.numctch:hover { background-image:url('/buttons/numctchgo.gif'); }
.numctch:active { background-image:url('/buttons/numctchsel.gif'); }

.random { display:inline-block; width:116px; height:40px; background-image:url('/buttons/articlesa.png'); }
.random:hover { background-image:url('/buttons/articlesgo.png'); }
.random:active { background-image:url('/buttons/articlessel.png'); }

.rants { display:inline-block; width:116px; height:40px; background-image:url('/buttons/rantsa.png'); }
.rants:hover { background-image:url('/buttons/rantsgo.png'); }
.rants:active { background-image:url('/buttons/rantssel.png'); }

.blog { display:inline-block; width:116px; height:40px; background-image:url('/buttons/bloga.png'); }
.blog:hover { background-image:url('/buttons/bloggo.png'); }
.blog:active { background-image:url('/buttons/blogsel.png'); }

.review { display:inline-block; width:116px; height:40px; background-image:url('/buttons/reviewa.png'); }
.review:hover { background-image:url('/buttons/reviewgo.png'); }
.review:active { background-image:url('/buttons/reviewsel.png'); }

.fui { display:inline-block; width:116px; height:40px; background-image:url('/buttons/fuia.gif'); }
.fui:hover { background-image:url('/buttons/fuigo.gif'); }
.fui:active { background-image:url('/buttons/fuisel.gif'); }

.vistaeos { display:inline-block; width:116px; height:40px; background-image:url('/buttons/vistaeosa.gif'); }
.vistaeos:hover { background-image:url('/buttons/vistaeosgo.gif'); }
.vistaeos:active { background-image:url('/buttons/vistaeossel.gif'); }

.mrs { display:inline-block; width:116px; height:40px; background-image:url('/buttons/mrsa.gif'); }
.mrs:hover { background-image:url('/buttons/mrsgo.gif'); }
.mrs:active { background-image:url('/buttons/mrssel.gif'); }

.mri { display:inline-block; width:116px; height:40px; background-image:url('/buttons/mria.gif'); }
.mri:hover { background-image:url('/buttons/mrigo.gif'); }
.mri:active { background-image:url('/buttons/mrisel.gif'); }

.streamreq { display:inline-block; width:116px; height:40px; background-image:url('/buttons/streamreqa.png'); }
.streamreq:hover { background-image:url('/buttons/streamreqgo.png'); }
.streamreq:active { background-image:url('/buttons/streamreqsel.png'); }