function Xajax()
{
if (xajaxDebug) thisDebugMessage = function(text) { alert(Xajax Debug:\n + text) };
thisworkId = xajaxWork+ new Date()getTime();
thisdepth = ;
//Get the XMLHttpRequest Object
thisgetRequestObject = function()
{
if (xajaxDebug) thisDebugMessage(Initializing Request Object);
var req;
try
{
req=new ActiveXObject(MsxmlXMLHTTP);
}
catch (e)
{
try
{
req=new ActiveXObject(MicrosoftXMLHTTP);
}
catch (e)
{
req=null;
}
}
if(!req && typeof XMLHttpRequest != undefined)
req = new XMLHttpRequest();
if (xajaxDebug) {
if (!req) thisDebugMessage(Request Object Instantiation failed);
}
return req;
}
// xajax$() is shorthand for documentgetElementById()
this$ = function(sId)//$是什么?
{
return documentgetElementById(sId);
}
// xajaxinclude(sFileName) dynamically includes an external javascript file
thisinclude = function(sFileName)
{
var objHead = documentgetElementsByTagName(head);
var objScript = documentcreateElement(script);
objScripttype = text/javascript;
objScriptsrc = sFileName;
objHead[]appendChild(objScript);
}
// xajaxaddHandler adds an event handler to an element
thisaddHandler = function(sElementId sEvent sFunctionName)
{
if (windowaddEventListener)
{
//eval的含义?
eval(this$(+sElementId+)addEventListener(+sEvent++sFunctionName+false););
}
else
{
eval(this$(+sElementId+)attachEvent(on+sEvent++sFunctionName+fal**););
}
}
// *ajaxremoveHandler removes an event handler from an element
thisremoveHandler = function(sElementId sEvent sFunctionName)
{
if (windowaddEventListener)
{
eval(this$(+sElementId+)removeEventListener(+sEvent++sFunctionName+false););
}
else
{
eval(this$(+sElementId+)detachEvent(on+sEvent++sFunctionName+fal**););
}
}
// *ajaxcreate creates a new child node under a parent
thiscreate = function(sParentId sTag sId)
{
var objParent = this$(sParentId);
objElement = documentcreateElement(sTag);
objElementsetAttribute(idsId);
objParentappendChild(objElement);
}
// xajaxinsert inserts a new node before another node
thisinsert = function(sBeforeId sTag sId)
{
var objSibling = this$(sBeforeId);
objElement = documentcreateElement(sTag);
objElementsetAttribute(idsId);
objSiblingparentNodeinsertBefore(objElement objSibling);
}
thisgetInput = function(sType sName sId)
{
var Obj;
if (sType == radio && !windowaddEventListener)
{
alert(here);
Obj = documentcreateElement(<input type=radio id=+sId+ name=+sName+>);
}
else
{
Obj = documentcreateElement(input);
ObjsetAttribute(typesType);
ObjsetAttribute(namesName);
ObjsetAttribute(idsId);
}
return Obj;
}
// xajaxcreateInput creates a new input node under a parent
thiscreateInput = function(sParentId sType sName sId)
{
var objParent = this$(sParentId);
var objElement = thisgetInput(sType sName sId);
objParentappendChild(objElement);
}
// xajaxinsertInput creates a new input node before another node
thisinsertInput = function(sBeforeId sType sName sId)
{
var objSibling = this$(sBeforeId);
var objElement = thisgetInput(sType sName sId);
objSiblingparentNodeinsertBefore(objElement objSibling);
}
// xajaxremove deletes an element
thisremove = function(sId)
{
objElement = this$(sId);
if (objElementparentNode && objElementparentNoderemoveChild)
{
objElementparentNoderemoveChild(objElement);
}
}
//xajaxreplace searches for text in an attribute of an element and replaces it
//with a different text
thisreplace = function(sIdsAttributesSearchsReplace)
{
var bFunction = false;
eval(var txt=documentgetElementById(+sId+)+sAttribute);
if (typeof txt == function)
{
txt = txttoString();
bFunction = true;
}
if (txtindexOf(sSearch)>)
{
var newTxt = ;
while (txtindexOf(sSearch) > )
{
x = txtindexOf(sSearch)+sSearchlength+;
newTxt += txtsubstr(x)replace(sSearchsReplace);
txt = txtsubstr(xtxtlengthx);
}
newTxt += txt;
if (bFunction)
{
eval(newTxt = + newTxt);
eval(this$(+sId+)+sAttribute+=newTxt;);
}
else if (thiswillChange(sIdsAttributenewTxt))
{
eval(this$(+sId+)+sAttribute+=newTxt;);
}
}
}
// xajaxgetFormValues() builds a query string XML message from the elements of a form object
function Xajax()
{
if (xajaxDebug) thisDebugMessage = function(text) { alert(Xajax Debug:\n + text) };
thisworkId = xajaxWork+ new Date()getTime();
thisdepth = ;
//Get the XMLHttpRequest Object
thisgetRequestObject = function()
{
if (xajaxDebug) thisDebugMessage(Initializing Request Object);
var req;
try
{
req=new ActiveXObject(MsxmlXMLHTTP);
}
catch (e)
{
try
{
req=new ActiveXObject(MicrosoftXMLHTTP);
}
catch (e)
{
req=null;
}
}
if(!req && typeof XMLHttpRequest != undefined)
req = new XMLHttpRequest();
if (xajaxDebug) {
if (!req) thisDebugMessage(Request Object Instantiation failed);
}
return req;
}
// xajax$() is shorthand for documentgetElementById()
this$ = function(sId)//$是什么?
{
return documentgetElementById(sId);
}
// xajaxinclude(sFileName) dynamically includes an external javascript file
thisinclude = function(sFileName)
{
var objHead = documentgetElementsByTagName(head);
var objScript = documentcreateElement(script);
objScripttype = text/javascript;
objScriptsrc = sFileName;
objHead[]appendChild(objScript);
}
// xajaxaddHandler adds an event handler to an element
thisaddHandler = function(sElementId sEvent sFunctionName)
{
if (windowaddEventListener)
{
//eval的含义?
eval(this$(+sElementId+)addEventListener(+sEvent++sFunctionName+false););
}
else
{
eval(this$(+sElementId+)attachEvent(on+sEvent++sFunctionName+fal**););
}
}
// *ajaxremoveHandler removes an event handler from an element
thisremoveHandler = function(sElementId sEvent sFunctionName)
{
if (windowaddEventListener)
{
eval(this$(+sElementId+)removeEventListener(+sEvent++sFunctionName+false););
}
else
{
eval(this$(+sElementId+)detachEvent(on+sEvent++sFunctionName+fal**););
}
}
// *ajaxcreate creates a new child node under a parent
thiscreate = function(sParentId sTag sId)
{
var objParent = this$(sParentId);
objElement = documentcreateElement(sTag);
objElementsetAttribute(idsId);
objParentappendChild(objElement);
}
// xajaxinsert inserts a new node before another node
thisinsert = function(sBeforeId sTag sId)
{
var objSibling = this$(sBeforeId);
objElement = documentcreateElement(sTag);
objElementsetAttribute(idsId);
objSiblingparentNodeinsertBefore(objElement objSibling);
}
thisgetInput = function(sType sName sId)
{
var Obj;
if (sType == radio && !windowaddEventListener)
{
alert(here);
Obj = documentcreateElement(<input type=radio id=+sId+ name=+sName+>);
}
else
{
Obj = documentcreateElement(input);
ObjsetAttribute(typesType);
ObjsetAttribute(namesName);
ObjsetAttribute(idsId);
}
return Obj;
}
// xajaxcreateInput creates a new input node under a parent
thiscreateInput = function(sParentId sType sName sId)
{
var objParent = this$(sParentId);
var objElement = thisgetInput(sType sName sId);
objParentappendChild(objElement);
}
// xajaxinsertInput creates a new input node before another node
thisinsertInput = function(sBeforeId sType sName sId)
{
var objSibling = this$(sBeforeId);
var objElement = thisgetInput(sType sName sId);
objSiblingparentNodeinsertBefore(objElement objSibling);
}
// xajaxremove deletes an element
thisremove = function(sId)
{
objElement = this$(sId);
if (objElementparentNode && objElementparentNoderemoveChild)
{
objElementparentNoderemoveChild(objElement);
}
}
//xajaxreplace searches for text in an attribute of an element and replaces it
//with a different text
thisreplace = function(sIdsAttributesSearchsReplace)
{
var bFunction = false;
eval(var txt=documentgetElementById(+sId+)+sAttribute);
if (typeof txt == function)
{
txt = txttoString();
bFunction = true;
}
if (txtindexOf(sSearch)>)
{
var newTxt = ;
while (txtindexOf(sSearch) > )
{
x = txtindexOf(sSearch)+sSearchlength+;
newTxt += txtsubstr(x)replace(sSearchsReplace);
txt = txtsubstr(xtxtlengthx);
}
newTxt += txt;
if (bFunction)
{
eval(newTxt = + newTxt);
eval(this$(+sId+)+sAttribute+=newTxt;);
}
else if (thiswillChange(sIdsAttributenewTxt))
{
eval(this$(+sId+)+sAttribute+=newTxt;);
}
}
}
// xajaxgetFormValues() builds a query string XML message from the elements of a form object
thiscall = function(sFunction aArgs sRequestType)
{
var irpostData;
if (documentbody && xajaxWaitCursor)
documentbodystylecursor = wait;
if (xajaxStatusMessages == true) windowstatus = Sending Request;
if (xajaxDebug) thisDebugMessage(Starting xajax);
if (sRequestType == null) {
var xajaxRequestType = xajaxDefinedPost;
}
else {
var xajaxRequestType = sRequestType;
}
var uri = xajaxRequestUri;
var value;
switch(xajaxRequestType)
{
ca** *ajaxDefinedGet:{
var uriGet = uriindexOf(?)==??xajax=+encodeURIComponent(sFunction):&xajax=+encodeURIComponent(sFunction);
for (i = ; i<aArgslength; i++)
{
value = aArgs[i];
if (typeof(value)==object)
value = thisobjectToXML(value);
uriGet += &xajaxargs[]=+encodeURIComponent(value);
}
uriGet += &xajaxr= + new Date()getTime();
uri += uriGet;
postData = null;
} break;
ca** *ajaxDefinedPost:{
postData = xajax=+encodeURIComponent(sFunction);
postData += &xajaxr=+new Date()getTime();
for (i = ; i <aArgslength; i++)
{
value = aArgs[i];
if (typeof(value)==object)
value = thisobjectToXML(value);
postData = postData+&xajaxargs[]=+encodeURIComponent(value);
}
} break;
default:
alert(Illegal request type: + xajaxRequestType); return false; break;
}
r = thisgetRequestObject();
ropen(xajaxRequestType==xajaxDefinedGet?GET:POST uri true);
if (xajaxRequestType == xajaxDefinedPost)
{
try
{
rsetRequestHeader(Method POST + uri + HTTP/);
rsetRequestHeader(ContentType application/xwwwformurlencoded; charset= + xajaxCharEncoding);
}
catch(e)
{
alert(Your browser does not appear to support asynchronous requests using POST);
return false;
}
}
ronreadystatechange = function()
{
if (rreadyState != )
return;
if (rstatus==)
{
if (xajaxDebug && rresponseTextlength < ) xajaxDebugMessage(Received:\n + rresponseText);
else if (xajaxDebug) xajaxDebugMessage(Received:\n + rresponseTextsubstr()+\n[long response]\n</xajax>);
if (rrespon***ML)
xajaxprocessResponse(rrespon***ML);
else {
alert(Error: the XML response that was returned from the server is invalid);
documentbodystylecursor = default;
if (xajaxStatusMessages == true) windowstatus = Invalid XML response error;
}
}
delete r;
}
if (xajaxDebug) thisDebugMessage(Calling +sFunction + uri=+uri+ (post:+ postData +));
rsend(postData);
if (xajaxStatusMessages == true) windowstatus = Waiting for data;
delete r;
return true;
}
// Tests if the new Data is the same as the extant data
thiswillChange = function(element attribute newData)
{
if (!documentbody)
{
return true;
}
var oldData;
if (attribute == innerHTML)
{
tmpXajax = this$(thisworkId);
if (tmpXajax == null)
{
tmpXajax = documentcreateElement(div);
tmpXajaxsetAttribute(idthisworkId);
tmpXajaxstyledisplay = none;
tmpXajaxstylevisibility = hidden;
documentbodyappendChild(tmpXajax);
}
tmpXajaxinnerHTML = newData;
newData = tmpXajaxinnerHTML;
tmpXajaxinnerHTML = ;
}
eval(oldData=documentgetElementById(+element+)+attribute);
if (newData != oldData)
return true;
return false;
}
//Process XML xajaxResponses returned from the request
thisprocessResponse = function(xml)
{
if (xajaxStatusMessages == true) windowstatus = Processing;
var tmpXajax = null;
xml = xmldocumentElement;
if (xml == null) {
alert(Error: the XML response that was returned from the server cannot be processed);
documentbodystylecursor = default;
if (xajaxStatusMessages == true) windowstatus = XML response processing error;
return;
}
for (i=; i<xmlchildNodeslength; i++)
{
if (xmlchildNodes[i]nodeName == cmd)
{
var cmd;
var id;
var property;
var data;
var search;
var type;
var before;
for (j=; j<xmlchildNodes[i]attributeslength; j++)
{
if (xmlchildNodes[i]attributes[j]name == n)
{
cmd = xmlchildNodes[i]attributes[j]value;
}
if (xmlchildNodes[i]attributes[j]name == t)
{
id = xmlchildNodes[i]attributes[j]value;
}
if (xmlchildNodes[i]attributes[j]name == p)
{
property = xmlchildNodes[i]attributes[j]value;
}
if (xmlchildNodes[i]attributes[j]name == c)
{
type = xmlchildNodes[i]attributes[j]value;
}
}
if (xmlchildNodes[i]childNodeslength > )
{
for (j=; j<xmlchildNodes[i]childNodeslength; j++)
{
if (xmlchildNodes[i]childNodes[j]nodeName == s)
{
if (xmlchildNodes[i]childNodes[j]firstChild)
search = xmlchildNodes[i]childNodes[j]firstChildnodeValue;
}
if (xmlchildNodes[i]childNodes[j]nodeName == r)
{
if (xmlchildNodes[i]childNodes[j]firstChild)
data = xmlchildNodes[i]childNodes[j]firstChilddata;
}
}
}
else if (xmlchildNodes[i]firstChild)
data = xmlchildNodes[i]firstChildnodeValue;
else
data = ;
var objElement = this$(id);
try
{
if (cmd==al)
{
alert(data);
}
if (cmd==js)
{
eval(data);
}
if (cmd==in)
{
thisinclude(data);
}
if (cmd==as)
{
if (thiswillChange(idpropertydata))
{
eval(objElement+property+=data;);
}
}
if (cmd==ap)
{
eval(objElement+property++=data;);
}
if (cm*==**)
{
eval(objElement+property+=data+objElement+property);
}
if (cmd==rp)
{
thisreplace(idpropertysearchdata)
}
if (cmd==rm)
{
thisremove(id);
}
if (cmd==ce)
{
thiscreate(iddataproperty);
}
if (cmd==ie)
{
thisinsert(iddataproperty);
}
if (cmd==ci)
{
thiscreateInput(idtypedataproperty);
}
if (cmd==ii)
{
thisinsertInput(idtypedataproperty);
}
if (cmd==ev)
{
eval(this$(+id+)+property+= function(){+data+;});
}
if (cmd==ah)
{
thisaddHandler(id property data);
}
if (cmd==rh)
{
thisremoveHandler(id property data);
}
}
catch(e)
{
alert(e);
}
delete objElement;
delete cmd;
delete id;
delete property;
delete search;
delete data;
delete type;
delete before;
}
}
delete xml;
documentbodystylecursor = default;
if (xajaxStatusMessages == true) windowstatus = Done;
}
}
var xajax = new Xajax();
