I'm very noobish when it comes to Javascript, in fact I wasn't intending to
use it at all, but I've got myself distracted by this "problem". I want to
use an animated gif as my favicon. This works fine in Firefox, but Opera
and IE6 ignore it. To get around this, I started off attempting a browser
detection script (I know!) which I cobbled together from a couple of others,
but this doesn't work (is it because I'm trying to do weird things within
the header?). If I want to go down that road I can do it in PHP anyway.
But I thought, there must surely be a more elegant way of doing this. Like
if (browsericonsupport = gif) then
use gif
else
use ico
Any comments would be gratefully received.
+e
P.S. - for anyone interested, this is my cobbled together browser detection
code; I know it doesn't do anything with the favicon, but I was just seeing
if it would actually detect browsers correctly. The first bit, which I got
from here: http://www.quirksmode.org/js/detect.html does pick out the
browser correctly (tested on Firefox, Opera and IE6) but when I attempt to
alert it falls straight through the code. If I add "alert(browserName);"
then it alerts with "undefined" in all three browsers. I appreciate this is
very noobish!
<HEAD>
<SCRIPT language="JavaScript">
<!--
var BrowserDetect = {
init: function () {
this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
this.version = this.searchVersion(navigator.userAgent)
|| this.searchVersion(navigator.appVersion)
|| "an unknown version";
this.OS = this.searchString(this.dataOS) || "an unknown OS";
},
searchString: function (data) {
for (var i=0;i<data.length;i++) {
var dataString = data[i].string;
var dataProp = data[i].prop;
this.versionSearchString = data[i].versionSearch || data[i].identity;
if (dataString) {
if (dataString.indexOf(data[i].subString) != -1)
return data[i].identity;
}
else if (dataProp)
return data[i].identity;
}
},
searchVersion: function (dataString) {
var index = dataString.indexOf(this.versionSearchString);
if (index == -1) return;
return
parseFloat(dataString.substring(index+this.version SearchString.length+1));
},
dataBrowser: [
{ string: navigator.userAgent,
subString: "OmniWeb",
versionSearch: "OmniWeb/",
identity: "OmniWeb"
},
{
string: navigator.vendor,
subString: "Apple",
identity: "Safari"
},
{
prop: window.opera,
identity: "Opera"
},
{
string: navigator.vendor,
subString: "iCab",
identity: "iCab"
},
{
string: navigator.vendor,
subString: "KDE",
identity: "Konqueror"
},
{
string: navigator.userAgent,
subString: "Firefox",
identity: "Firefox"
},
{
string: navigator.vendor,
subString: "Camino",
identity: "Camino"
},
{ // for newer Netscapes (6+)
string: navigator.userAgent,
subString: "Netscape",
identity: "Netscape"
},
{
string: navigator.userAgent,
subString: "MSIE",
identity: "Explorer",
versionSearch: "MSIE"
},
{
string: navigator.userAgent,
subString: "Gecko",
identity: "Mozilla",
versionSearch: "rv"
},
{ // for older Netscapes (4-)
string: navigator.userAgent,
subString: "Mozilla",
identity: "Netscape",
versionSearch: "Mozilla"
}
],
dataOS : [
{
string: navigator.platform,
subString: "Win",
identity: "Windows"
},
{
string: navigator.platform,
subString: "Mac",
identity: "Mac"
},
{
string: navigator.platform,
subString: "Linux",
identity: "Linux"
}
]
};
BrowserDetect.init;
//bit nicked from http://www.quirksmode.org/js/detect.html above
//bit cobbled together by me below
var browserName = BrowserDetect.browser;
if (browserName=="Netscape")
{
alert("Hi Netscape User!");
}
else
{
if (browserName=="Explorer")
{
alert("Hi, Explorer User!");
}
else
{
if (browserName=="Firefox")
{
alert("Hi, Firefox User!");
}
else
{
if (operaName=="Opera")
{
alert("Hi, Opera User!");
}
else
{
alert("What ARE you browsing with here?");
}
}
}
}
//-->
</SCRIPT>
</HEAD>
