原创]discuz中用到的javascript函数解析" target="_blank">[原创]discuz中用到的javascript函数解析

var lang = new Array();
var userAgent = navigator.userAgent.toLowerCase();
var is_opera = userAgent.indexOf('opera') != -1 && opera.version();
var is_moz = (navigator.product == 'Gecko') && userAgent.substr(userAgent.indexOf('firefox') + 8, 3);
var is_ie = (userAgent.indexOf('msie') != -1 && !is_opera) && userAgent.substr(userAgent.indexOf('msie') + 5, 3);

function $(id) {
return document.getElementById(id);
}
//定义数组的push属性
Array.prototype.push = function(value) {
this[this.length] = value;
return this.length;
}
//javascript全选函数
function checkall(form, prefix, checkall) {
var checkall = checkall ? checkall : 'chkall';
for(var i = 0; i < form.elements.length; i++) {
var e = form.elements[i];
if(e.name && e.name != checkall && (!prefix || (prefix && e.name.match(prefix)))) {
e.checked = form.elements[checkall].checked;
}
}
}

function doane(event) {
e = event ? event : window.event;
if(is_ie) {
e.returnValue = false;
e.cancelBubble = true;
} else if(e) {
e.stopPropagation();
e.preventDefault();
}
}

function fetchCheckbox(cbn) {
return $(cbn) && $(cbn).checked == true ? 1 : 0;
}

function getcookie(name) {
var cookie_start = document.cookie.indexOf(name);
var cookie_end = document.cookie.indexOf(";", cookie_start);
return cookie_start == -1 ? '' : unescape(document.cookie.substring(cookie_start + name.length + 1, (cookie_end > cookie_start ? cookie_end : document.cookie.length)));
}

function thumbImg(obj) {
var zw = obj.width;
var zh = obj.height;
if(is_ie && zw == 0 && zh == 0) {
var matches;
re = /width=(["']?)(\d+)(\1)/i;
matches = re.exec(obj.outerHTML);
zw = matches[2];
re = /height=(["']?)(\d+)(\1)/i;
matches = re.exec(obj.outerHTML);
zh = matches[2];
}
obj.resized = true;
obj.style.width = zw + 'px';
obj.style.height = 'auto';
if(obj.offsetHeight > zh) {
obj.style.height = zh + 'px';
obj.style.width = 'auto';
}
if(is_ie) {
var imgid = 'img_' + Math.random();
obj.id = imgid;
setTimeout('try {if ($(\''+imgid+'\').offsetHeight > '+zh+') {$(\''+imgid+'\').style.height = \''+zh+'px\';$(\''+imgid+'\').style.width = \'auto\';}} catch(e){}', 1000);
}
obj.onload = null;
}

function imgzoom(obj) {}

function in_array(needle, haystack) {
if(typeof needle == 'string' || typeof needle == 'number') {
for(var i in haystack) {
if(haystack[i] == needle) {
return true;
}
}
}
return false;
}

function setcopy(text, alertmsg){
if(is_ie) {
clipboardData.setData('Text', text);
alert(alertmsg);
} else if(prompt('Press Ctrl+C Copy to Clipboard', text)) {
alert(alertmsg);
}
}

function isUndefined(variable) {
return typeof variable == 'undefined' ? true : false;
}

function mb_strlen(str) {
var len = 0;
for(var i = 0; i < str.length; i++) {
len += str.charCodeAt(i) < 0 || str.charCodeAt(i) > 255 ? (charset == 'utf-8' ? 3 : 2) : 1;
}
return len;
}

function setcookie(cookieName, cookieValue, seconds, path, domain, secure) {
var expires = new Date();
expires.setTime(expires.getTime() + seconds);
document.cookie = escape(cookieName) + '=' + escape(cookieValue)
+ (expires ? '; expires=' + expires.toGMTString() : '')
+ (path ? '; path=' + path : '/')
+ (domain ? '; domain=' + domain : '')
+ (secure ? '; secure' : '');
}

function strlen(str) {
return (is_ie && str.indexOf('\n') != -1) ? str.replace(/\r?\n/g, '_').length : str.length;
}

function updatestring(str1, str2, clear) {
str2 = '_' + str2 + '_';
return clear ? str1.replace(str2, '') : (str1.indexOf(str2) == -1 ? str1 + str2 : str1);
}

function toggle_collapse(objname, noimg) {
var obj = $(objname);
obj.style.display = obj.style.display == '' ? 'none' : '';
if(!noimg) {
var img = $(objname + '_img');
img.src = img.src.indexOf('_yes.gif') == -1 ? img.src.replace(/_no\.gif/, '_yes\.gif') : img.src.replace(/_yes\.gif/, '_no\.gif');
}
var collapsed = getcookie('discuz_collapse');
collapsed = updatestring(collapsed, objname, !obj.style.display);
setcookie('discuz_collapse', collapsed, (collapsed ? 86400 * 30 : -(86400 * 30 * 1000)));
}

function trim(str) {
return (str + '').replace(/(\s+)$/g, '').replace(/^\s+/g, '');
}

function _attachEvent(obj, evt, func) {
if(obj.addEventListener) {
obj.addEventListener(evt, func, false);
} else if(obj.attachEvent) {
obj.attachEvent("on" + evt, func);
}
}

var jsmenu = new Array();
var ctrlobjclassName;
jsmenu['active'] = new Array();
jsmenu['timer'] = new Array();
jsmenu['iframe'] = new Array();

function initCtrl(ctrlobj, click, duration, timeout, layer) {
if(ctrlobj && !ctrlobj.initialized) {
ctrlobj.initialized = true;
ctrlobj.unselectable = true;

ctrlobj.outfunc = typeof ctrlobj.onmouseout == 'function' ? ctrlobj.onmouseout : null;
ctrlobj.onmouseout = function() {
if(this.outfunc) this.outfunc();
if(duration < 3) jsmenu['timer'][ctrlobj.id] = setTimeout('hideMenu(' + layer + ')', timeout);
}

ctrlobj.overfunc = typeof ctrlobj.onmouseover == 'function' ? ctrlobj.onmouseover : null;
ctrlobj.onmouseover = function(e) {
doane(e);
if(this.overfunc) this.overfunc();
if(click) {
clearTimeout(jsmenu['timer'][this.id]);
} else {
for(var id in jsmenu['timer']) {
if(jsmenu['timer'][id]) clearTimeout(jsmenu['timer'][id]);
}
}
}
}
}

function initMenu(ctrlid, menuobj, duration, timeout, layer, drag) {
if(menuobj && !menuobj.initialized) {
menuobj.initialized = true;
menuobj.ctrlkey = ctrlid;
menuobj.onclick = ebygum;
menuobj.style.position = 'absolute';
if(duration < 3) {
if(duration > 1) {
menuobj.onmouseover = function() {
clearTimeout(jsmenu['timer'][ctrlid]);
}
}
if(duration != 1) {
menuobj.onmouseout = function() {
jsmenu['timer'][ctrlid] = setTimeout('hideMenu(' + layer + ')', timeout);
}
}
}
menuobj.style.zIndex = 50;
if(is_ie) {
menuobj.style.filter += "progid:DXImageTransform.Microsoft.shadow(direction=135,color=#CCCCCC,strength=2)";
}
if(drag) {
menuobj.onmousedown = function(event) {try{menudrag(menuobj, event, 1);}catch(e){}};
menuobj.onmousemove = function(event) {try{menudrag(menuobj, event, 2);}catch(e){}};
menuobj.onmouseup = function(event) {try{menudrag(menuobj, event, 3);}catch(e){}};
}
}
}

var menudragstart = new Array();
function menudrag(menuobj, e, op) {
if(op == 1) {
if(in_array(is_ie ? event.srcElement.tagName : e.target.tagName, ['TEXTAREA', 'INPUT', 'BUTTON', 'SELECT'])) {
return;
}
menudragstart = is_ie ? [event.clientX, event.clientY] : [e.clientX, e.clientY];
menudragstart[2] = parseInt(menuobj.style.left);
menudragstart[3] = parseInt(menuobj.style.top);
doane(e);
} else if(op == 2 && menudragstart[0]) {
var menudragnow = is_ie ? [event.clientX, event.clientY] : [e.clientX, e.clientY];
menuobj.style.left = (menudragstart[2] + menudragnow[0] - menudragstart[0]) + 'px';
menuobj.style.top = (menudragstart[3] + menudragnow[1] - menudragstart[1]) + 'px';
doane(e);
} else if(op == 3) {
menudragstart = [];
doane(e);
}
}

function showMenu(ctrlid, click, offset, duration, timeout, layer, showid, maxh, drag) {
var ctrlobj = $(ctrlid);
if(!ctrlobj) return;
if(isUndefined(click)) click = false;
if(isUndefined(offset)) offset = 0;
if(isUndefined(duration)) duration = 2;
if(isUndefined(timeout)) timeout = 500;
if(isUndefined(layer)) layer = 0;
if(isUndefined(showid)) showid = ctrlid;
var showobj = $(showid);
var menuobj = $(showid + '_menu');
if(!showobj|| !menuobj) return;
if(isUndefined(maxh)) maxh = 400;
if(isUndefined(drag)) drag = false;

if(click && jsmenu['active'][layer] == menuobj) {
hideMenu(layer);
return;
} else {
hideMenu(layer);
}

var len = jsmenu['timer'].length;
if(len > 0) {
for(var i=0; i<len; i++) {
if(jsmenu['timer'][i]) clearTimeout(jsmenu['timer'][i]);
}
}

initCtrl(ctrlobj, click, duration, timeout, layer);
ctrlobjclassName = ctrlobj.className;
ctrlobj.className += ' hover';
initMenu(ctrlid, menuobj, duration, timeout, layer, drag);

menuobj.style.display = '';
if(!is_opera) {
menuobj.style.clip = 'rect(auto, auto, auto, auto)';
}

setMenuPosition(showid, offset);

if(is_ie && is_ie < 7) {
if(!jsmenu['iframe'][layer]) {
var iframe = document.createElement('iframe');
iframe.style.display = 'none';
iframe.style.position = 'absolute';
iframe.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)';
$('append_parent') ? $('append_parent').appendChild(iframe) : menuobj.parentNode.appendChild(iframe);
jsmenu['iframe'][layer] = iframe;
}
jsmenu['iframe'][layer].style.top = menuobj.style.top;
jsmenu['iframe'][layer].style.left = menuobj.style.left;
jsmenu['iframe'][layer].style.width = menuobj.w;
jsmenu['iframe'][layer].style.height = menuobj.h;
jsmenu['iframe'][layer].style.display = 'block';
}

if(maxh && menuobj.scrollHeight > maxh) {
menuobj.style.height = maxh + 'px';
if(is_opera) {
menuobj.style.overflow = 'auto';
} else {
menuobj.style.overflowY = 'auto';
}
}

if(!duration) {
setTimeout('hideMenu(' + layer + ')', timeout);
}

jsmenu['active'][layer] = menuobj;
}

function setMenuPosition(showid, offset) {
var showobj = $(showid);
var menuobj = $(showid + '_menu');
if(isUndefined(offset)) offset = 0;
if(showobj) {
showobj.pos = fetchOffset(showobj);
showobj.X = showobj.pos['left'];
showobj.Y = showobj.pos['top'];
showobj.w = showobj.offsetWidth;
showobj.h = showobj.offsetHeight;
menuobj.w = menuobj.offsetWidth;
menuobj.h = menuobj.offsetHeight;
if(offset < 3) {
menuobj.style.left = (showobj.X + menuobj.w > document.body.clientWidth) && (showobj.X + showobj.w - menuobj.w >= 0) ? showobj.X + showobj.w - menuobj.w + 'px' : showobj.X + 'px';
menuobj.style.top = offset == 1 ? showobj.Y + 'px' : (offset == 2 || ((showobj.Y + showobj.h + menuobj.h > document.documentElement.scrollTop + document.documentElement.clientHeight) && (showobj.Y - menuobj.h >= 0)) ? (showobj.Y - menuobj.h) + 'px' : showobj.Y + showobj.h + 'px');
} else if(offset == 3) {
menuobj.style.left = (document.body.clientWidth - menuobj.clientWidth) / 2 + document.body.scrollLeft + 'px';
menuobj.style.top = (document.body.clientHeight - menuobj.clientHeight) / 2 + document.body.scrollTop + 'px';
}
if(menuobj.style.clip && !is_opera) {
menuobj.style.clip = 'rect(auto, auto, auto, auto)';
}
}
}

function hideMenu(layer) {
if(isUndefined(layer)) layer = 0;
if(jsmenu['active'][layer]) {
try {
$(jsmenu['active'][layer].ctrlkey).className = ctrlobjclassName;
} catch(e) {}
clearTimeout(jsmenu['timer'][jsmenu['active'][layer].ctrlkey]);
jsmenu['active'][layer].style.display = 'none';
if(is_ie && is_ie < 7 && jsmenu['iframe'][layer]) {
jsmenu['iframe'][layer].style.display = 'none';
}
jsmenu['active'][layer] = null;
}
}

function fetchOffset(obj) {
var left_offset = obj.offsetLeft;
var top_offset = obj.offsetTop;
while((obj = obj.offsetParent) != null) {
left_offset += obj.offsetLeft;
top_offset += obj.offsetTop;
}
return { 'left' : left_offset, 'top' : top_offset };
}

function ebygum(eventobj) {
if(!eventobj || is_ie) {
window.event.cancelBubble = true;
return window.event;
} else {
if(eventobj.target.type == 'submit') {
eventobj.target.form.submit();
}
eventobj.stopPropagation();
return eventobj;
}
}

function menuoption_onclick_function(e) {
this.clickfunc();
hideMenu();
}

function menuoption_onclick_link(e) {
choose(e, this);
}

function menuoption_onmouseover(e) {
this.className = 'popupmenu_highlight';
}

function menuoption_onmouseout(e) {
this.className = 'popupmenu_option';
}

function choose(e, obj) {
var links = obj.getElementsByTagName('a');
if(links[0]) {
if(is_ie) {
links[0].click();
window.event.cancelBubble = true;
} else {
if(e.shiftKey) {
window.open(links[0].href);
e.stopPropagation();
e.preventDefault();
} else {
window.location = links[0].href;
e.stopPropagation();
e.preventDefault();
}
}
hideMenu();
}
}

function smiletypescroll(direct) {
if(direct == 0) {
$('smileytypes').scrollTop -= 28;
} else {
$('smileytypes').scrollTop += 28;
}
}

var Ajaxs = new Array();
var AjaxStacks = new Array(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
var attackevasive = isUndefined(attackevasive) ? 0 : attackevasive;
function Ajax(recvType, waitId) {

for(var stackId = 0; stackId < AjaxStacks.length && AjaxStacks[stackId] != 0; stackId++);
AjaxStacks[stackId] = 1;

var aj = new Object();

aj.loading = 'Loading...';//public
aj.recvType = recvType ? recvType : 'XML';//public
aj.waitId = waitId ? $(waitId) : null;//public

aj.resultHandle = null;//private
aj.sendString = '';//private
aj.targetUrl = '';//private
aj.stackId = 0;
aj.stackId = stackId;

aj.setLoading = function(loading) {
if(typeof loading !== 'undefined' && loading !== null) aj.loading = loading;
}

aj.setRecvType = function(recvtype) {
aj.recvType = recvtype;
}

aj.setWaitId = function(waitid) {
aj.waitId = typeof waitid == 'object' ? waitid : $(waitid);
}

aj.createXMLHttpRequest = function() {
var request = false;
if(window.XMLHttpRequest) {
request = new XMLHttpRequest();
if(request.overrideMimeType) {
request.overrideMimeType('text/xml');
}
} else if(window.ActiveXObject) {
var versions = ['Microsoft.XMLHTTP', 'MSXML.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.7.0', 'Msxml2.XMLHTTP.6.0', 'Msxml2.XMLHTTP.5.0', 'Msxml2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];
for(var i=0; i<versions.length; i++) {
try {
request = new ActiveXObject(versions[i]);
if(request) {
return request;
}
} catch(e) {}
}
}
return request;
}

aj.XMLHttpRequest = aj.createXMLHttpRequest();
aj.showLoading = function() {
if(aj.waitId && (aj.XMLHttpRequest.readyState != 4 || aj.XMLHttpRequest.status != 200)) {
changedisplay(aj.waitId, '');
aj.waitId.innerHTML = '<span><img src="' + IMGDIR + '/loading.gif"> ' + aj.loading + '</span>';
}
}

aj.processHandle = function() {
if(aj.XMLHttpRequest.readyState == 4 && aj.XMLHttpRequest.status == 200) {
for(k in Ajaxs) {
if(Ajaxs[k] == aj.targetUrl) {
Ajaxs[k] = null;
}
}
if(aj.waitId) changedisplay(aj.waitId, 'none');
if(aj.recvType == 'HTML') {
aj.resultHandle(aj.XMLHttpRequest.responseText, aj);
} else if(aj.recvType == 'XML') {
aj.resultHandle(aj.XMLHttpRequest.responseXML.lastChild.firstChild.nodeValue, aj);
}
AjaxStacks[aj.stackId] = 0;
}
}

aj.get = function(targetUrl, resultHandle) {

setTimeout(function(){aj.showLoading()}, 500);
if(in_array(targetUrl, Ajaxs)) {
return false;
} else {
Ajaxs.push(targetUrl);
}
aj.targetUrl = targetUrl;
aj.XMLHttpRequest.onreadystatechange = aj.processHandle;
aj.resultHandle = resultHandle;
var delay = attackevasive & 1 ? (aj.stackId + 1) * 1001 : 100;
if(window.XMLHttpRequest) {
setTimeout(function(){
aj.XMLHttpRequest.open('GET', aj.targetUrl);
aj.XMLHttpRequest.send(null);}, delay);
} else {
setTimeout(function(){
aj.XMLHttpRequest.open("GET", targetUrl, true);
aj.XMLHttpRequest.send();}, delay);
}

}
aj.post = function(targetUrl, sendString, resultHandle) {
setTimeout(function(){aj.showLoading()}, 500);
if(in_array(targetUrl, Ajaxs)) {
return false;
} else {
Ajaxs.push(targetUrl);
}
aj.targetUrl = targetUrl;
aj.sendString = sendString;
aj.XMLHttpRequest.onreadystatechange = aj.processHandle;
aj.resultHandle = resultHandle;
aj.XMLHttpRequest.open('POST', targetUrl);
aj.XMLHttpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
aj.XMLHttpRequest.send(aj.sendString);
}
return aj;
}

function newfunction(func){
var args = new Array();
for(var i=1; i<arguments.length; i++) args.push(arguments[i]);
return function(event){
doane(event);
window[func].apply(window, args);
return false;
}
}

function changedisplay(obj, display) {
if(display == 'auto') {
obj.style.display = obj.style.display == '' ? 'none' : '';
} else {
obj.style.display = display;
}
return false;
}

var evalscripts = new Array();
function evalscript(s) {
if(s.indexOf('<script') == -1) return s;
var p = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/ig;
var arr = new Array();
while(arr = p.exec(s)) {
appendscript(arr[1], '', arr[2], arr[3]);
}
s = s.replace(p, '');
p = /<script(.*?)>([^\x00]+?)<\/script>/ig;
while(arr = p.exec(s)) {
appendscript('', arr[2], arr[1].indexOf('reload=') != -1);
}
return s;
}

function appendscript(src, text, reload, charset) {
var id = hash(src + text);
if(!reload && in_array(id, evalscripts)) return;
if(reload && $(id)) {
$(id).parentNode.removeChild($(id));
}

evalscripts.push(id);
var scriptNode = document.createElement("script");
scriptNode.type = "text/javascript";
scriptNode.id = id;
scriptNode.charset = charset;
try {
if(src) {
scriptNode.src = src;
} else if(text){
scriptNode.text = text;
}
$('append_parent').appendChild(scriptNode);
} catch(e) {}
}

function stripscript(s) {
return s.replace(/<script.*?>.*?<\/script>/ig, '');
}