var ie=(navigator.appVersion.indexOf("MSIE")!=-1 && parseFloat(navigator.appVersion)>=4)?true:false;
var mozilla=(navigator.appName=="Netscape" && parseFloat(navigator.appVersion)>=5)?true:false;
var opera5=(navigator.appName=="Opera" && parseFloat(navigator.appVersion)>=5 && parseFloat(navigator.appVersion)<7)?true:false;
var opera7=(navigator.appName=="Opera" && parseFloat(navigator.appVersion)>=7)?true:false;

if(ie) document.write ('<script language="JavaScript" type="text/javascript" src="/js/div_ie.js"></script>');
if(mozilla) document.write ('<script language="JavaScript" type="text/javascript" src="/js/div_mozilla.js"></script>');
if(opera5) document.write ('<script language="JavaScript" type="text/javascript" src="/js/div_opera5.js"></script>');
if(opera7) document.write ('<script language="JavaScript" type="text/javascript" src="/js/div_opera7.js"></script>');