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Detect JavaScript Enabled and cokies on SERVER SIDE

P: n/a
Hey all,

I have some problems detecting whether the client's browser javascript
is enabled at the server side.
While Request.Browser.JavaScript only check if the browser enable java
script (and so on with Request.Browser.Cookies).

I saw some server controls that register a startup script on the
page_load
and then perform a postback and run the javascript,changing a hidden
html input button and check if his value changed.

Does anyone have any idea how 2 do this thing without postback and on
the server side ?

10x alot !!

oreng.
Nov 18 '05 #1
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1 Reply


P: n/a
// Everything you always wanted to know about your JavaScript client
// but were afraid to ask. Creates "is_" variables indicating:
// (1) browser vendor:
// is_nav, is_ie, is_opera, is_hotjava, is_webtv, is_TVNavigator,
is_AOLTV
// (2) browser version number:
// is_major (integer indicating major version number: 2, 3, 4 ...)
// is_minor (float indicating full version number: 2.02, 3.01, 4.04
....)
// (3) browser vendor AND major version number
// is_nav2, is_nav3, is_nav4, is_nav4up, is_nav6, is_nav6up, is_gecko,
is_ie3,
// is_ie4, is_ie4up, is_ie5, is_ie5up, is_ie5_5, is_ie5_5up, is_ie6,
is_ie6up, is_hotjava3, is_hotjava3up,
// is_opera2, is_opera3, is_opera4, is_opera5, is_opera5up
// (4) JavaScript version number:
// is_js (float indicating full JavaScript version number: 1, 1.1, 1.2
....)
// (5) OS platform and version:
// is_win, is_win16, is_win32, is_win31, is_win95, is_winnt, is_win98,
is_winme, is_win2k
// is_os2
// is_mac, is_mac68k, is_macppc
// is_unix
// is_sun, is_sun4, is_sun5, is_suni86
// is_irix, is_irix5, is_irix6
// is_hpux, is_hpux9, is_hpux10
// is_aix, is_aix1, is_aix2, is_aix3, is_aix4
// is_linux, is_sco, is_unixware, is_mpras, is_reliant
// is_dec, is_sinix, is_freebsd, is_bsd
// is_vms
//
// See http://www.it97.de/JavaScript/JS_tut...at/navobj.html and
// http://www.it97.de/JavaScript/JS_tut...rowseraol.html
// for detailed lists of userAgent strings.
//
// Note: you don't want your Nav4 or IE4 code to "turn off" or
// stop working when new versions of browsers are released, so
// in conditional code forks, use is_ie5up ("IE 5.0 or greater")
// is_opera5up ("Opera 5.0 or greater") instead of is_ie5 or is_opera5
// to check version in code which you want to work on future
// versions.

// convert all characters to lowercase to simplify testing
var agt=navigator.userAgent.toLowerCase();

// *** BROWSER VERSION ***
// Note: On IE5, these return 4, so use is_ie5up to detect IE5.
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);

// Note: Opera and WebTV spoof Navigator. We do strict client
detection.
// If you want to allow spoofing, take out the tests for opera and
webtv.
var is_nav = ((agt.indexOf('mozilla')!=-1) &&
(agt.indexOf('spoofer')==-1)
&& (agt.indexOf('compatible') == -1) &&
(agt.indexOf('opera')==-1)
&& (agt.indexOf('webtv')==-1) &&
(agt.indexOf('hotjava')==-1));
var is_nav2 = (is_nav && (is_major == 2));
var is_nav3 = (is_nav && (is_major == 3));
var is_nav4 = (is_nav && (is_major == 4));
var is_nav4up = (is_nav && (is_major >= 4));
var is_navonly = (is_nav && ((agt.indexOf(";nav") != -1) ||
(agt.indexOf("; nav") != -1)) );
var is_nav6 = (is_nav && (is_major == 5));
var is_nav6up = (is_nav && (is_major >= 5));
var is_gecko = (agt.indexOf('gecko') != -1);
var is_ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera")
== -1));
var is_ie3 = (is_ie && (is_major < 4));
var is_ie4 = (is_ie && (is_major == 4) && (agt.indexOf("msie
4")!=-1) );
var is_ie4up = (is_ie && (is_major >= 4));
var is_ie5 = (is_ie && (is_major == 4) && (agt.indexOf("msie
5.0")!=-1) );
var is_ie5_5 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5")
!=-1));
var is_ie5up = (is_ie && !is_ie3 && !is_ie4);
var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
var is_ie6 = (is_ie && (is_major == 4) && (agt.indexOf("msie
6.")!=-1) );
var is_ie6up = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);

// KNOWN BUG: On AOL4, returns false if IE3 is embedded browser
// or if this is the first browser window opened. Thus the
// variables is_aol, is_aol3, and is_aol4 aren't 100% reliable.
var is_aol = (agt.indexOf("aol") != -1);
var is_aol3 = (is_aol && is_ie3);
var is_aol4 = (is_aol && is_ie4);
var is_aol5 = (agt.indexOf("aol 5") != -1);
var is_aol6 = (agt.indexOf("aol 6") != -1);

var is_opera = (agt.indexOf("opera") != -1);
var is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2")
!= -1);
var is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3")
!= -1);
var is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4")
!= -1);
var is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5")
!= -1);
var is_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);

var is_webtv = (agt.indexOf("webtv") != -1);

var is_TVNavigator = ((agt.indexOf("navio") != -1) ||
(agt.indexOf("navio_aoltv") != -1));
var is_AOLTV = is_TVNavigator;

var is_hotjava = (agt.indexOf("hotjava") != -1);
var is_hotjava3 = (is_hotjava && (is_major == 3));
var is_hotjava3up = (is_hotjava && (is_major >= 3));

// *** JAVASCRIPT VERSION CHECK ***
var is_js;
if (is_nav2 || is_ie3) is_js = 1.0;
else if (is_nav3) is_js = 1.1;
else if (is_opera5up) is_js = 1.3;
else if (is_opera) is_js = 1.1;
else if ((is_nav4 && (is_minor <= 4.05)) || is_ie4) is_js = 1.2;
else if ((is_nav4 && (is_minor > 4.05)) || is_ie5) is_js = 1.3;
else if (is_hotjava3up) is_js = 1.4;
else if (is_nav6 || is_gecko) is_js = 1.5;
// NOTE: In the future, update this code when newer versions of JS
// are released. For now, we try to provide some upward compatibility
// so that future versions of Nav and IE will show they are at
// *least* JS 1.x capable. Always check for JS version compatibility
// with > or >=.
else if (is_nav6up) is_js = 1.5;
// NOTE: ie5up on mac is 1.4
else if (is_ie5up) is_js = 1.3

// HACK: no idea for other browsers; always check for JS version with >
or >=
else is_js = 0.0;

// *** PLATFORM ***
var is_win = ( (agt.indexOf("win")!=-1) ||
(agt.indexOf("16bit")!=-1) );
// NOTE: On Opera 3.0, the userAgent string includes "Windows 95/NT4" on
all
// Win32, so you can't distinguish between Win95 and WinNT.
var is_win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows
95")!=-1));

// is this a 16 bit compiled version?
var is_win16 = ((agt.indexOf("win16")!=-1) ||
(agt.indexOf("16bit")!=-1) || (agt.indexOf("windows
3.1")!=-1) ||
(agt.indexOf("windows 16-bit")!=-1) );

var is_win31 = ((agt.indexOf("windows 3.1")!=-1) ||
(agt.indexOf("win16")!=-1) ||
(agt.indexOf("windows 16-bit")!=-1));

var is_winme = ((agt.indexOf("win 9x 4.90")!=-1));
var is_win2k = ((agt.indexOf("windows nt 5.0")!=-1));

// NOTE: Reliable detection of Win98 may not be possible. It appears
that:
// - On Nav 4.x and before you'll get plain "Windows" in
userAgent.
// - On Mercury client, the 32-bit version will return "Win98",
but
// the 16-bit version running on Win98 will still return
"Win95".
var is_win98 = ((agt.indexOf("win98")!=-1) || (agt.indexOf("windows
98")!=-1));
var is_winnt = ((agt.indexOf("winnt")!=-1) || (agt.indexOf("windows
nt")!=-1));
var is_win32 = (is_win95 || is_winnt || is_win98 ||
((is_major >= 4) && (navigator.platform == "Win32")) ||
(agt.indexOf("win32")!=-1) ||
(agt.indexOf("32bit")!=-1));

var is_os2 = ((agt.indexOf("os/2")!=-1) ||
(navigator.appVersion.indexOf("OS/2")!=-1) ||
(agt.indexOf("ibm-webexplorer")!=-1));

var is_mac = (agt.indexOf("mac")!=-1);
// hack ie5 js version for mac
if (is_mac && is_ie5up) is_js = 1.4;
var is_mac68k = (is_mac && ((agt.indexOf("68k")!=-1) ||
(agt.indexOf("68000")!=-1)));
var is_macppc = (is_mac && ((agt.indexOf("ppc")!=-1) ||
(agt.indexOf("powerpc")!=-1)));

var is_sun = (agt.indexOf("sunos")!=-1);
var is_sun4 = (agt.indexOf("sunos 4")!=-1);
var is_sun5 = (agt.indexOf("sunos 5")!=-1);
var is_suni86= (is_sun && (agt.indexOf("i86")!=-1));
var is_irix = (agt.indexOf("irix") !=-1); // SGI
var is_irix5 = (agt.indexOf("irix 5") !=-1);
var is_irix6 = ((agt.indexOf("irix 6") !=-1) || (agt.indexOf("irix6")
!=-1));
var is_hpux = (agt.indexOf("hp-ux")!=-1);
var is_hpux9 = (is_hpux && (agt.indexOf("09.")!=-1));
var is_hpux10= (is_hpux && (agt.indexOf("10.")!=-1));
var is_aix = (agt.indexOf("aix") !=-1); // IBM
var is_aix1 = (agt.indexOf("aix 1") !=-1);
var is_aix2 = (agt.indexOf("aix 2") !=-1);
var is_aix3 = (agt.indexOf("aix 3") !=-1);
var is_aix4 = (agt.indexOf("aix 4") !=-1);
var is_linux = (agt.indexOf("inux")!=-1);
var is_sco = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);
var is_unixware = (agt.indexOf("unix_system_v")!=-1);
var is_mpras = (agt.indexOf("ncr")!=-1);
var is_reliant = (agt.indexOf("reliantunix")!=-1);
var is_dec = ((agt.indexOf("dec")!=-1) || (agt.indexOf("osf1")!=-1) ||
(agt.indexOf("dec_alpha")!=-1) ||
(agt.indexOf("alphaserver")!=-1) ||
(agt.indexOf("ultrix")!=-1) ||
(agt.indexOf("alphastation")!=-1));
var is_sinix = (agt.indexOf("sinix")!=-1);
var is_freebsd = (agt.indexOf("freebsd")!=-1);
var is_bsd = (agt.indexOf("bsd")!=-1);
var is_unix = ((agt.indexOf("x11")!=-1) || is_sun || is_irix || is_hpux
||
is_sco ||is_unixware || is_mpras || is_reliant ||
is_dec || is_sinix || is_aix || is_linux || is_bsd ||
is_freebsd);

var is_vms = ((agt.indexOf("vax")!=-1) ||
(agt.indexOf("openvms")!=-1));

//--> end hide JavaScript

More info at
http://www.mozilla.org/docs/web-deve...wser_type.html

--
Tamir Khason
You want dot.NET? Just ask:
"Please, www.dotnet.us "
"oreng" <o_*********@hotmail.com> wrote in message
news:50**************************@posting.google.c om...
Hey all,

I have some problems detecting whether the client's browser javascript
is enabled at the server side.
While Request.Browser.JavaScript only check if the browser enable java
script (and so on with Request.Browser.Cookies).

I saw some server controls that register a startup script on the
page_load
and then perform a postback and run the javascript,changing a hidden
html input button and check if his value changed.

Does anyone have any idea how 2 do this thing without postback and on
the server side ?

10x alot !!

oreng.

Nov 18 '05 #2

This discussion thread is closed

Replies have been disabled for this discussion.