var browserName=navigator.userAgent; 

 if (navigator.userAgent.indexOf('Safari')!=-1) {  document.write('<link rel="stylesheet" href="backboxx.css" type="text/css">')}
else if (navigator.userAgent.indexOf('Opera')!=-1) {  document.write('<link rel="stylesheet" href="backboxxExplorer.css" type="text/css">')}
else if (navigator.userAgent.indexOf('OmniWeb')!=-1) {  document.write('<link rel="stylesheet" href="backboxx.css" type="text/css">')}
else if (((navigator.userAgent.indexOf('MSIE')!=-1) || (navigator.userAgent.indexOf('Internet Explorer')!=-1)) && (navigator.userAgent.indexOf('Mozilla\/4.')!=-1)) { document.write('<link rel="stylesheet" href="backboxxExplorer.css" type="text/css">')}
else if (navigator.userAgent.indexOf('Firefox')!=-1) {  document.write('<link rel="stylesheet" href="backboxxFirefox.css" type="text/css">')}
else if (navigator.userAgent.indexOf('Mozilla')!=-1) {  document.write('<link rel="stylesheet" href="backboxxFirefox.css" type="text/css">')}
else if (navigator.userAgent.indexOf('Netscape')!=-1) {  document.write('<link rel="stylesheet" href="backboxx.css" type="text/css">')}
else if (navigator.userAgent.indexOf('Konqueror')!=-1) {  document.write('<link rel="stylesheet" href="backboxxFirefox.css" type="text/css">')}
else if (navigator.userAgent.indexOf('Camino')!=-1) {  document.write('<link rel="stylesheet" href="backboxxFirefox.css" type="text/css">')}
else {  document.write('<link rel="stylesheet" href="backboxxExplorer.css" type="text/css">')}