a.btn, a.btn:hover, a.btn:active { border-radius: 15px; behavior: url(border-radius.htc); }
a.btn { filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#850a0c', endColorstr='#a91012'); -ms-filter: "progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#850a0c', endColorstr='#a91012')"; }
a.btn:hover { filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#bd1517', endColorstr='#950c0f'); -ms-filter: "progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#bd1517', endColorstr='#950c0f')"; }
a.btn:active { filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#850a0c', endColorstr='#a91012'); -ms-filter: "progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#850a0c', endColorstr='#a91012')"; }
/* http://snipplr.com/view/63665/css3-solutions-for-internet-explorer/ */