JavaScript::Browser Detection

Browser Detection

// Internet Explorer

var ie  = document.all != null;  //ie4 and above

var ie5 = document.getElementById && document.all;

var ie6 = document.getElementById && document.all&&(navigator.appVersion.indexOf("MSIE>=0);

// Netscape

var ns4 = document.layers != null;

var ns6 = document.getElementById && !document.all;

var ns  = ns4 || ns6;

// Firefox

var ff  = !document.layers && !document.all;

// Opera

var op  = navigator.userAgent.indexOf("opera")>0;

var op7 = op && operaVersion() <= 7;

var op8 = op && operaVersion() >= 8;

// Detects the Opera version

function operaVersion() {

          agent = navigator.userAgent;

          idx = agent.indexOf("opera");       

          if (idx>-1) {

                    return parseInt(agent.subString(idx+6,idx+7));

          }

}