var isIE = (navigator.appVersion.indexOf("MSIE") != -1);
if ( isIE ) {
  document.write( '<link rel="stylesheet" type="text/css" href="/sip/styles/sip_iestyle.css" />' );
}
else {
  document.write( '<link rel="stylesheet" type="text/css" href="/sip/styles/sip_iestyle.css" />' );
  //document.write( '<link rel="stylesheet" type="text/css" href="/sip/styles/sip_nsstyle.css" />' );
}