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

//检查浏览器检测浏览器的函数
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('兼容') == -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);

//全局寄存器
var currentblogid;
var currentstarid;
var currentcommentid;
var switchcomandmes;
var securitycodejs=null;
var onetimecounter=1;

//获取绝对路径，修复IE设置基本路径时的bug
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);
} 其他 {
    absbaseurl='';
    abspath=null;
}
//是否支持Ajax？
if ((is_ie & !is_ie4) || is_moz || is_saf || is_opera) var shutajax=0;
其他varshutajax = 1;

//对于 Firefox，告诉 Firefox 不要显示您在上一个会话中输入的内容
if (is_moz) {
    var tmp_c=document.getElementById('v_content');
    if (tmp_c) tmp_c.value='';
}

//显示/隐藏 p
function showhidep(id){
  try{
    var panel=document.getElementById(id);
    if(panel){
      if(panel.style.display=='none'){
        panel.style.display='block';
      }其他{
        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;
    }
}

函数 showadminreply (pid) {
    switchcomandmes='回复';
    var cleanid=pid.replace('com_', '');
    var inputcontent="

";
    inputcontent =jslang[0] "
< ;br/>”;
    inputcontent ="

";
    document.getElementById(pid).innerHTML=inputcontent;
    document.getElementById(pid).style.display='block';
}

函数 showadminreplyformessage (pid) {
    switchcomandmes='message';
    var cleanid=pid.replace('com_', '');
    var inputcontent="

";
    inputcontent =jslang[0] "
< ;br/>”;
    inputcontent ="

";
    document.getElementById(pid).innerHTML=inputcontent;
    document.getElementById(pid).style.display='block';
}

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

函数 showdelblog(blogid) {
    var urldel=absbaseurl "admin.php?go=entry_deleteblog_" blogid '';
    if(confirm(jslang[4])){
        window.location=urldel;
    }
    其他 {
        返回；
    }
}

function comfirmurl(urldel) {
    if(confirm(jslang[5])){
        window.location=absbaseurl urldel;
    }
    其他 {
        返回；
    }
}

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

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

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

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

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

/* -- AJAX 相关函数 -- */
//主演
函数 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;
    }
}

//评论和消息
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]);
            返回 false；
        }
        v_security_plus="&v_security=" v_security;
    } 其他 {
        v_security_plus='';
    }
    if (v_replier=='' || v_content==''|| v_replier==' ' || v_content==' ' ) {
        alert(jslang[11]);
        返回 false；
    }
    document.getElementById('btnSubmit').value=jslang[12];
    document.getElementById('btnSubmit').disabled='disabled';
    if (shutajax==0) { //目前适用于 IE、Safari、Mozilla 和 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 键提交(Textarea)
function ctrlenterkey (eventobject){
    if(eventobject.ctrlKey && eventobject.keyCode==13) {
        document.getElementById("btnSubmit").click();
    }
}

//管理员回复
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=='回复') ? 'editreply' : '编辑消息';
    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);
}


//编码字符串
function blogencode (str) {
    str=encodeURIComponent(str);
    if (is_moz) str=str.replace(/ /g，” "); //在 IE 中，新行编码为 rn，而在 Mozilla 中为 n
    return str;
}

//头像选择
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="" ;
        }
        else {
           areashow.innerHTML=jslang[13];
        }
    }
}

//插入表情s
函数插入（ emotcode) {
    var current=document.getElementById('v_content');
    var emot="[emot]" emotcode "[/emot]"
    if {
        if ( current.value!='' && current.value!=null) {
            当前.值=emot;
        }
        其他 {
            current.value=emo;
        }
        document.getElementById('v_content').focus();
    }
}

// 显示/隐藏侧边栏
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);
    }其他{
      objSidebar.className="sidebar";
      objSidebar.style.display="block";
      objContent.className="content";
      setCookie('sidebaroff', 0,null, null, null, false);
    }
  }catch(e){}
}

函数 loadSidebar(){
  尝试{
    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";
    }其他{
      objSidebar.className="sidebar";
      objSidebar.style.display="block";
      objContent.className="content";
    }
  }catch(e){}
}




//媒体链接
function playmedia(strID,strType,strURL,intWidth ,intHeight) {
    var objp=document.getElementById(strID);
    if (!objp) 返回 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';
    }
}

//媒体构建
function makemedia (strType,strURL,intWidth,intHeight,strID) {
    var strHtml;
    switch(strType) {
        case 'wmp':
            strHtml="";
            休息；
        案例“swf”：
            strHtml="";
            休息；
        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);
            休息；
        case 'real':
            strHtml=";
";
            休息；
    }
    return strHtml;
}

//字体大小控制
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) ? “”：“”；路径=“路径；
    var domainString = (path == null) ? “”：“”；域=“域；
    var secureString = (secure) ?";secure" :"";
    document.cookie = nameString  expiryString  pathString  domainString  secureString；
}

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

    while (i         start = i ;
        结束 = 开始  名称.长度；
        if (CookieString.substring(start, end) == 名称){
            CookieFound = true;
            休息；
        }
        i ;
    }

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

function deleteCookie(name) {
    var expires = new Date();
    expires.setTime (expires.getTime() - 1);
    setCookie(名称,“删除 Cookie”,过期,null,null,false);
}

function refreshsecuritycode(areaid, inputid) {
    if (document.getElementById(areaid)) {
        var rnds=Math.random();
        document.getElementById(areaid).innerHTML="";
    }
    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            tmpSavecookie='savecookie' i;
            if (document.getElementById(tmpSavecookie).checked) {
                var savecookie = blogencode(document.getElementById(tmpSavecookie).value);
                休息；
            }
        }
        var postData = "unuse=unuse&username="用户名"&password="密码"&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);
    }
}

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

函数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);
    }
}

函数decodetburl（str，ishidden，uniqueid）{
    var resultstr ='';
    if (ishidden==1) {//隐藏！
        var randomnumber1=Math.floor(Math.random()*10 1);
        var randomnumber2=Math.floor(Math.random()*10 1);
        resultstr="" jslang[66] " " randomnumber1 "   " randomnumber2 " =  " str "";
    }
    else {
        var codestr;
        codestr=str.split('%');
        var seed=codestr[0];
        for (var i=1; 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]);
    其他 {
        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) 返回；
    else if (pswproperty.checked) {
        var pswtxt=prompt(jslang[69],'');
        if (pswtxt==null || pswtxt=='') {
            pswproperty.checked='';
            返回；
        } 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);
    }
}