一个不错的可以检测多中浏览器的函数和其它功能_javascript技巧

//Examine the browser 检测浏览器的函数
var userAgent = navigator.userAgent.toLowerCase();
var is_opera = (userAgent.indexOf('opera') != -1);
var is_saf = ((userAgent.indexOf('applewebkit') != -1) || (navigator.vendor == 'Apple Computer, Inc.'));
var is_webtv = (userAgent.indexOf('webtv') != -1);
var is_ie = ((userAgent.indexOf('msie') != -1) && (!is_opera) && (!is_saf) && (!is_webtv));
var is_ie4 = ((is_ie) && (userAgent.indexOf('msie 4.') != -1));
var is_moz = ((navigator.product == 'Gecko') && (!is_saf));
var is_kon = (userAgent.indexOf('konqueror') != -1);
var is_ns = ((userAgent.indexOf('compatible') == -1) && (userAgent.indexOf('mozilla') != -1) && (!is_opera) && (!is_webtv) && (!is_saf));
var is_ns4 = ((is_ns) && (parseInt(navigator.appVersion) == 4));
var is_mac = (userAgent.indexOf('mac') != -1);

//Global registers
var currentblogid;
var currentstarid;
var currentcommentid;
var switchcomandmes;
var securitycodejs=null;
var onetimecounter=1;

//Get absolute path, fix bug of IE when base path is set
var gotourl = location.href;
var absbaseurl;
var abspath;
var r_identifier=gotourl.lastIndexOf("/read.php/");
var r_identifier2=gotourl.lastIndexOf("/post/");
var r_identifier3=gotourl.lastIndexOf("/tag/");
if (r_identifier==-1) {
r_identifier=r_identifier2;
}
if (r_identifier==-1) {
r_identifier=r_identifier3;
}
if (r_identifier!=-1) {
absbaseurl = gotourl.substr(0, r_identifier)+"/";
var simplegotourl=absbaseurl.replace("http://", '');
r_identifier2=simplegotourl.indexOf("/");
abspath=simplegotourl.substr(r_identifier2+1);
} else {
absbaseurl='';
abspath=null;
}
//Is Ajax supported?
if ((is_ie & !is_ie4) || is_moz || is_saf || is_opera) var shutajax=0;
else var shutajax=1;

//For firefox, tell Firefox not to display the content you input in last session
if (is_moz) {
var tmp_c=document.getElementById('v_content');
if (tmp_c) tmp_c.value='';
}

//Show/Hide a p
function showhidep(id){
try{
var panel=document.getElementById(id);
if(panel){
if(panel.style.display=='none'){
panel.style.display='block';
}else{
panel.style.display='none';
}
}
}catch(e){}
}

function addhtml (id, htmlcode, uniqueid) {
var panel=document.getElementById(id);
var hiddenpannel=document.getElementById(uniqueid);
if(panel){
hiddenpannel.value='';
hiddenpannel.value=panel.innerHTML;
panel.innerHTML=hiddenpannel.value+htmlcode;
hiddenpannel.value+=htmlcode;
}
}

function showadminreply (pid) {
switchcomandmes='reply';
var cleanid=pid.replace('com_', '');
var inputcontent="<form action='"+absbaseurl+"admin.php?go=reply_addadminreply_"+cleanid+"' method='post' id='formadminreply"+cleanid+"'>";
inputcontent+=jslang[0]+"<br/><textarea cols='66' rows='3' name='adminreplycontent' id='adminreplycontent"+cleanid+"'></textarea><br/>";
inputcontent+="<input type='button' onclick=\"ajax_adminreply('"+cleanid+"'); return false;\" value='"+jslang[1]+"' class='button'/> <input type='reset' value='"+jslang[2]+"' class='button'/> <input type='button' value='"+jslang[3]+"' onclick=\"hideadminreply('"+pid+"');\" class='button'/></form>";
document.getElementById(pid).innerHTML=inputcontent;
document.getElementById(pid).style.display='block';
}

function showadminreplyformessage (pid) {
switchcomandmes='message';
var cleanid=pid.replace('com_', '');
var inputcontent="<form action='"+absbaseurl+"admin.php?go=message_addadminreply_"+cleanid+"' method='post' id='formadminreply"+cleanid+"'>";
inputcontent+=jslang[0]+"<br/><textarea cols='66' rows='3' name='adminreplycontent' id='adminreplycontent"+cleanid+"'></textarea><br/>";
inputcontent+="<input type='button' onclick=\"ajax_adminreply('"+cleanid+"'); return false;\" value='"+jslang[1]+"' class='button'/> <input type='reset' value='"+jslang[2]+"' class='button'/> <input type='button' value='"+jslang[3]+"' onclick=\"hideadminreply('"+pid+"');\" class='button'/></form>";
document.getElementById(pid).innerHTML=inputcontent;
document.getElementById(pid).style.display='block';
}

function hideadminreply (pid) {
document.getElementById(pid).innerHTML='';
document.getElementById(pid).style.display='none';
}

function showdelblog(blogid) {
var urldel=absbaseurl+"admin.php?go=entry_deleteblog_"+blogid+'';
if(confirm(jslang[4])){
window.location=urldel;
}
else {
return;
}
}

function comfirmurl(urldel) {
if(confirm(jslang[5])){
window.location=absbaseurl+urldel;
}
else {
return;
}
}

function showdeladminreply(repid) {
var urldel=absbaseurl+"admin.php?go=reply_deladminreply_"+repid+'';
if(confirm(jslang[6])){
if (shutajax==1) window.location=urldel;
else {
urldel+="&ajax=on";
currentcommentid=repid;
makeRequest(urldel, 'quickdeladminreply', 'GET', null);
}
}
else {
return;
}
}

function showdeladminreplyformessage(repid) {
var urldel=absbaseurl+"admin.php?go=message_deladminreply_"+repid+'';
if(confirm(jslang[7])){
if (shutajax==1) window.location=urldel;
else {
urldel+="&ajax=on";
currentcommentid=repid;
makeRequest(urldel, 'quickdeladminreply', 'GET', null);
}
}
else {
return;
}
}

function showdelreply(repid, blogid) {
var urldel=absbaseurl+"admin.php?go=reply_delreply_"+repid+'-'+blogid;
if(confirm(jslang[8])){
if (shutajax==1) window.location=urldel;
else {
urldel+="&ajax=on";
currentcommentid=repid;
makeRequest(urldel, 'quickdelreply', 'GET', null);
}
}
else {
return;
}
}

function showdelreplyformessage(repid) {
var urldel=absbaseurl+"admin.php?go=message_delreply_"+repid;
if(confirm(jslang[9])){
if (shutajax==1) window.location=urldel;
else {
urldel+="&ajax=on";
currentcommentid=repid;
makeRequest(urldel, 'quickdelreply', 'GET', null);
}
}
else {
return;
}
}

function showblockreply(repid, blogid) {
var urldel=absbaseurl+"admin.php?go=reply_block_"+repid+'-'+blogid;
if (shutajax==1) window.location=urldel;
else {
urldel+="&ajax=on";
currentcommentid=repid;
makeRequest(urldel, 'quickdelreply', 'GET', null);
}
}

function showblockmessage(repid) {
var urldel=absbaseurl+"admin.php?go=message_block_"+repid;
if (shutajax==1) window.location=urldel;
else {
urldel+="&ajax=on";
currentcommentid=repid;
makeRequest(urldel, 'quickdelreply', 'GET', null);
}
}

/* -- AJAX RELATED FUNCTIONS -- */
//Starring
function dostar(blogid) {
if (shutajax==0) {
gourl=absbaseurl+"admin.php?go=star&ajax=on&blogid="+blogid;
currentblogid=blogid;
currentstarid="starid"+blogid;
makeRequest(gourl, 'starblog', 'GET', null);
} else {
gourl=absbaseurl+"admin.php?go=star&ajax=off&blogid="+blogid;
window.location=gourl;
}
}

//Comment and Message
function ajax_submit (job) {
var stat_html = document.getElementById('stat_html').checked ? 1 : 0;
var stat_ubb = document.getElementById('stat_ubb').checked ? 1 : 0;
var stat_emot = document.getElementById('stat_emot').checked ? 1 : 0;
var stat_property = document.getElementById('stat_property').checked ? 1 : 0;
var v_replier = document.getElementById('v_replier').value+' ';
var v_repurl = document.getElementById('v_repurl').value;
var v_repemail = document.getElementById('v_repemail').value;
var v_content = document.getElementById('v_content').value+' ';
var v_password = document.getElementById('v_password').value;
var v_id = document.getElementById('v_id').value;
var v_reppsw = (document.getElementById('v_reppsw')) ? document.getElementById('v_reppsw').value : '';
var v_security_plus;
if (document.getElementById('v_security')) {
var v_security = document.getElementById('v_security').value;
if (v_security=='') {
alert(jslang[10]);
return false;
}
v_security_plus="&v_security="+v_security;
} else {
v_security_plus='';
}
if (v_replier=='' || v_content==''|| v_replier==' ' || v_content==' ' ) {
alert(jslang[11]);
return false;
}
document.getElementById('btnSubmit').value=jslang[12];
document.getElementById('btnSubmit').disabled='disabled';
if (shutajax==0) { //Currently for IE, Safari, Mozilla and Opera
v_replier = blogencode(v_replier);
v_repurl = blogencode(v_repurl);
v_repemail = blogencode(v_repemail);
v_content = blogencode(v_content);
v_password = blogencode(v_password);
v_id = blogencode(v_id);
v_reppsw = blogencode(v_reppsw);
var postData = "unuse=unuse&onetimecounter="+onetimecounter+"&v_id="+v_id+"&v_replier="+v_replier+"&v_password="+v_password+"&v_repurl="+v_repurl+"&v_repemail="+v_repemail+"&v_content="+v_content+"&stat_html="+stat_html+"&stat_ubb="+stat_ubb+"&stat_emot="+stat_emot+"&v_reppsw="+v_reppsw+"&stat_property="+stat_property+v_security_plus;
var gourl=absbaseurl+"visit.php?ajax=on&job="+job;
makeRequest(gourl, 'quickreply', 'POST', postData);
} else {
document.getElementById('visitorinput').submit();
}
}

//Ctrl+Enter key submitting (Textarea)
function ctrlenterkey (eventobject){
if(eventobject.ctrlKey && eventobject.keyCode==13) {
document.getElementById("btnSubmit").click();
}
}

//Admin reply
function ajax_adminreply (commentid) {
if (shutajax==0) {
var admid='adminreplycontent'+commentid;
var adminreplycontent = blogencode(document.getElementById(admid).value);
var postData = "unuse=unuse&adminreplycontent="+adminreplycontent;
var gourl=absbaseurl+"admin.php?ajax=on&go="+switchcomandmes+"_addadminreply_"+commentid;
currentcommentid=commentid;
makeRequest(gourl, 'quickadminreply', 'POST', postData);
} else {
var admid='formadminreply'+commentid;
document.getElementById(admid).submit();
}
}

function ajax_adminreply_edit (commentid, rptype) {
switchcomandmes=rptype;
ajax_adminreply(commentid);
}

function ajax_editcomment(repid, submitaction, onetimecounter) {
var admid='editcomcontent'+repid;
var v_content = blogencode(document.getElementById(admid).value);
var editjob=(submitaction=='reply') ? 'editreply' : 'editmessage';
var postData = "unuse=unuse&onetimecounter="+onetimecounter+"&v_content="+v_content;
var gourl=absbaseurl+"visit.php?ajax=on&go="+editjob+"&repid="+repid;
currentcommentid=repid;
makeRequest(gourl, 'quickeditcomment', 'POST', postData);
}


//encode string
function blogencode (str) {
str=encodeURIComponent(str);
if (is_moz) str=str.replace(/%0A/g, "%0D%0A"); //In IE, a new line is encoded as \r\n, while in Mozilla it's \n
return str;
}

//Avatar Selection
function changeavatar (slname, area) {
var current=document.getElementById(slname);
var realvalue=current.options[current.selectedIndex].value;
var areashow=document.getElementById(area);
if (areashow) {
if (realvalue!='' && realvalue!=null) {
areashow.innerHTML="<img src='images/avatars/"+realvalue+"' alt=''/>";
}
else {
areashow.innerHTML=jslang[13];
}
}
}

//Insert Emots
function insertemot (emotcode) {
var current=document.getElementById('v_content');
var emot="[emot]"+emotcode+"[/emot]";
if (current) {
if (current.value!='' && current.value!=null) {
current.value+=emot;
}
else {
current.value=emot;
}
document.getElementById('v_content').focus();
}
}

// Show/Hide Sidebar
function showHideSidebar(){
try{
var objSidebar=document.getElementById("sidebar");
var objContent=document.getElementById("content");
if(objSidebar.className!="sidebar-hide"){
objSidebar.className="sidebar-hide";
objSidebar.style.display="none";
objContent.className="content-wide";
setCookie('sidebaroff', 1,null, null, null, false);
}else{
objSidebar.className="sidebar";
objSidebar.style.display="block";
objContent.className="content";
setCookie('sidebaroff', 0,null, null, null, false);
}
}catch(e){}
}

function loadSidebar(){
try{
var objSidebar=document.getElementById("sidebar");
var objContent=document.getElementById("content");
var sidebaroff=getCookie ('sidebaroff');
if(sidebaroff==1){
objSidebar.className="sidebar-hide";
objSidebar.style.display="none";
objContent.className="content-wide";
}else{
objSidebar.className="sidebar";
objSidebar.style.display="block";
objContent.className="content";
}
}catch(e){}
}




//Media Link
function playmedia(strID,strType,strURL,intWidth,intHeight) {
var objp=document.getElementById(strID);
if (!objp) return false;
if (objp.style.display!='none') {
objp.innerHTML='';
objp.style.display='none';
} else {
objp.innerHTML=makemedia(strType,strURL,intWidth,intHeight,strID);
objp.style.display='block';
}
}

//Media Build
function makemedia (strType,strURL,intWidth,intHeight,strID) {
var strHtml;
switch(strType) {
case 'wmp':
strHtml="<object width='"+intWidth+"' height='"+intHeight+"' classid='CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6'><param name='url' value='"+strURL+"'/><embed width='"+intWidth+"' height='"+intHeight+"' type='application/x-mplayer2' src='"+strURL+"'></embed></object>";
break;
case 'swf':
strHtml="<object classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000' width='"+intWidth+"' height='"+intHeight+"'><param name='movie' value='"+strURL+"'/><param name='quality' value='high' /><embed src='"+strURL+"' quality='high' type='application/x-shockwave-flash' width='"+intWidth+"' height='"+intHeight+"'></embed></object>";
break;
case 'flv':
var FU = {movie:"images/others/mediaplayer.swf",width:intWidth,height:+intHeight,majorversion:"8",build:"0",bgcolor:"#FFFFFF",allowfullscreen:"true",flashvars:"file="+strURL+"&fullscreenpage=images/others/fullscreen.html&fsreturnpage="+location.href};UFO.create(FU, strID);
break;
case 'real':
strHtml="<object classid='clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA' width='"+intWidth+"' height='"+intHeight+"'><param name='src' value='"+absbaseurl+"inc/realplay.php?link="+strURL+"' /><param name='controls' value='Imagewindow' /><param name='console' value='clip1' /><param name='autostart' value='true' /><embed src='"+absbaseurl+"inc/realplay.php?link="+strURL+"' type='audio/x-pn-realaudio-plugin' autostart='true' console='clip1' controls='Imagewindow' width='"+intWidth+"' height='"+intHeight+"'></embed></object><br/><object classid='clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA' width='"+intWidth+"' height='44'><param name='src' value='"+absbaseurl+"inc/realplay.php?link="+strURL+"' /><param name='controls' value='ControlPanel' /><param name='console' value='clip1' /><param name='autostart' value='true' /><embed src='"+absbaseurl+"inc/realplay.php?link="+strURL+"' type='audio/x-pn-realaudio-plugin' autostart='true' console='clip1' controls='ControlPanel' width='"+intWidth+"' height='44'></embed></object>";
break;
}
return strHtml;
}

//Font size control
function doZoom(size) {
document.getElementById('zoomtext').style.fontSize=size+'px';
}


//Cookie
function setCookie(name,value,expiry,path,domain,secure) {
var nameString = name + "=" + value;
var expiryString = (expiry == null) ? "" : " ;expires = "+ expiry.toGMTString();
var pathString = (path == null) ? "" : " ;path = "+ path;
var domainString = (path == null) ? "" : " ;domain = "+ domain;
var secureString = (secure) ?";secure" :"";
document.cookie = nameString + expiryString + pathString + domainString + secureString;
}

function getCookie (name) {
var CookieFound = false;
var start = 0;
var end = 0;
var CookieString = document.cookie;
var i = 0;

while (i <= CookieString.length) {
start = i ;
end = start + name.length;
if (CookieString.substring(start, end) == name){
CookieFound = true;
break;
}
i++;
}

if (CookieFound){
start = end + 1;
end = CookieString.indexOf(";",start);
if (end < start) end = CookieString.length;
return unescape(CookieString.substring(start, end));
}
return "";
}

function deleteCookie(name) {
var expires = new Date();
expires.setTime (expires.getTime() - 1);
setCookie( name , "Delete Cookie", expires,null,null,false);
}

function refreshsecuritycode(areaid, inputid) {
if (document.getElementById(areaid)) {
var rnds=Math.random();
document.getElementById(areaid).innerHTML="<img src='inc/securitycode.php?rand="+rnds+"' alt=''/>";
}
if (document.getElementById(inputid)) document.getElementById(inputid).value='';
}

function ajax_login () {
if (shutajax==0) {
var username = blogencode(document.getElementById('username').value);
var password = blogencode(document.getElementById('password').value);
var tmpSavecookie;
for (var i=1; i<=5; i++) {
tmpSavecookie='savecookie'+i;
if (document.getElementById(tmpSavecookie).checked) {
var savecookie = blogencode(document.getElementById(tmpSavecookie).value);
break;
}
}
var postData = "unuse=unuse&username="+username+"&password="+password+"&savecookie="+savecookie;
if (document.getElementById('securitycode')) postData+="&securitycode="+blogencode(document.getElementById('securitycode').value);
var gourl=absbaseurl+"login.php?ajax=on&job=ajaxverify";
makeRequest(gourl, 'quicklogin', 'POST', postData);
}
}

function quicklogout() {
setCookie ('userid','',null,null, null, false);
setCookie ('userpsw','',null,null, null, false);
}

function quickremember() {
var v_replier = blogencode(document.getElementById('v_replier').value);
var v_repurl = blogencode(document.getElementById('v_repurl').value);
var v_repemail = blogencode(document.getElementById('v_repemail').value);
var dateObjexp= new Date();
dateObjexp.setSeconds(3600*24*365);
if (document.getElementById('stat_rememberme').checked) {
setCookie ('rem_v_replier', v_replier, dateObjexp, null, null, false);
setCookie ('rem_v_repurl', v_repurl, dateObjexp, null, null, false);
setCookie ('rem_v_repemail', v_repemail, dateObjexp, null, null, false);
setCookie ('rem_v_rememberme', '1', dateObjexp, null, null, false);
} else {
setCookie ('rem_v_replier', '', dateObjexp, null, null, false);
setCookie ('rem_v_repurl', '', dateObjexp, null, null, false);
setCookie ('rem_v_repemail', '', dateObjexp, null, null, false);
setCookie ('rem_v_rememberme', '0', dateObjexp, null, null, false);
}
}

function decodetburl (str, ishidden, uniqueid) {
var resultstr='';
if (ishidden==1) { //Hidden!
var randomnumber1=Math.floor(Math.random()*10+1);
var randomnumber2=Math.floor(Math.random()*10+1);
resultstr="<span id=\"showtbq"+uniqueid+"\">"+jslang[66]+" <span id=\"qa"+uniqueid+"\">"+randomnumber1+"</span> <strong>+</strong> <span id=\"qb"+uniqueid+"\">"+randomnumber2+"</span> <strong>=</strong> <input type='text' id='ans"+uniqueid+"' maxlength='2' size='2'/> <input type='button' onclick='submithiddentbanswer(\""+uniqueid+"\");' value='"+jslang[1]+"'/><span id=\"answertb"+uniqueid+"\" style=\"display: none;\">"+str+"</span></span>";
}
else {
var codestr;
codestr=str.split('%');
var seed=codestr[0];
for (var i=1; i<codestr.length; i++) {
resultstr+=String.fromCharCode(codestr[i]-seed);
}
}
return resultstr;
}

function submithiddentbanswer(uniqueid) {
var randomnumber1=(document.getElementById("qa"+uniqueid)) ? parseInt(document.getElementById("qa"+uniqueid).innerHTML) : 0;
var randomnumber2=(document.getElementById("qb"+uniqueid)) ? parseInt(document.getElementById("qb"+uniqueid).innerHTML) : 0;
var anssubmited=(document.getElementById("ans"+uniqueid)) ? parseInt(document.getElementById("ans"+uniqueid).value) : 0;
if (randomnumber1+randomnumber2!=anssubmited) alert (jslang[67]);
else {
var resultstr=(document.getElementById("answertb"+uniqueid)) ? document.getElementById("answertb"+uniqueid).innerHTML : null;
resultstr=decodetburl (resultstr, 0, 0);
if (document.getElementById("showtbq"+uniqueid)) document.getElementById("showtbq"+uniqueid).innerHTML=resultstr;
}
}

function getprotectedblog (blogid, way) {
var blogpsw=blogencode(document.getElementById('entrypsw'+blogid).value);
currentblogid=blogid;
var postData = "unuse=unuse&job=getcontentonly&way="+way+"&blogid="+blogid+"&blogpsw="+blogpsw;
if (shutajax==0) {
var gourl=absbaseurl+"visit.php?ajax=on";
makeRequest(gourl, 'quickgetprotectedblog', 'POST', postData);
}
}

function promptreppsw () {
var pswproperty=document.getElementById('stat_property');
if (!pswproperty) return;
else if (pswproperty.checked) {
var pswtxt=prompt(jslang[69],'');
if (pswtxt==null || pswtxt=='') {
pswproperty.checked='';
return;
} else {
if (pswtxt.length>12) {
alert(jslang[70]);
promptreppsw();
}
document.getElementById('v_reppsw').value=pswtxt;
}
} else {
document.getElementById('v_reppsw').value='';
}
}

function getprotectedreply (repid, way, onetimecounter) {
var reppsw=blogencode(document.getElementById('reppsw'+repid).value);
currentcommentid=repid;
var postData = "unuse=unuse&job=getreplyonly&way="+way+"&reppsw="+reppsw+"&repid="+currentcommentid+"&onetimecounter"+onetimecounter;
if (shutajax==0) {
var gourl=absbaseurl+"visit.php?ajax=on";
makeRequest(gourl, 'quickeditcomment', 'POST', postData);
}
}