知识大全给大家讲个不错的ajax组件

Posted 2022-07-19 知

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　　function Xajax() if (xajaxDebug) this DebugMessage = function(text) alert( Xajax Debug:\\n + text) ;

　　this workId = xajaxWork + new Date() getTime(); this depth = ;

　　//Get the XMLHttpRequest Object this getRequestObject = function() if (xajaxDebug) this DebugMessage( Initializing Request Object ); var req; try req=new ActiveXObject( Msxml XMLHTTP ); catch (e) try req=new ActiveXObject( Microsoft XMLHTTP ); catch (e ) req=null; if(!req && typeof XMLHttpRequest != undefined ) req = new XMLHttpRequest();

　　if (xajaxDebug) if (!req) this DebugMessage( Request Object Instantiation failed );

　　return req;

　　// xajax $() is shorthand for document getElementById() this $ = function(sId)//$是什么? return document getElementById(sId);

　　// xajax include(sFileName) dynamically includes an external javascript file this include = function(sFileName) var objHead = document getElementsByTagName( head ); var objScript = document createElement( script ); objScript type = text/javascript ; objScript src = sFileName; objHead[ ] appendChild(objScript);

　　// xajax addHandler adds an event handler to an element this addHandler = function(sElementId sEvent sFunctionName) if (window addEventListener) //eval的含义? eval( this $( +sElementId+ ) addEventListener( +sEvent+ +sFunctionName+ false); ); else eval( this $( +sElementId+ ) attachEvent( on +sEvent+ +sFunctionName+ fal**); );

　　// *ajax removeHandler removes an event handler from an element this removeHandler = function(sElementId sEvent sFunctionName) if (window addEventListener) eval( this $( +sElementId+ ) removeEventListener( +sEvent+ +sFunctionName+ false); ); else eval( this $( +sElementId+ ) detachEvent( on +sEvent+ +sFunctionName+ fal**); );

　　// *ajax create creates a new child node under a parent this create = function(sParentId sTag sId) var objParent = this $(sParentId); objElement = document createElement(sTag); objElement setAttribute( id sId); objParent appendChild(objElement);

　　// xajax insert inserts a new node before another node this insert = function(sBeforeId sTag sId) var objSibling = this $(sBeforeId); objElement = document createElement(sTag); objElement setAttribute( id sId); objSibling parentNode insertBefore(objElement objSibling);

　　this getInput = function(sType sName sId) var Obj; if (sType == radio && !window addEventListener) alert( here ); Obj = document createElement( <input type= radio id= +sId+ name= +sName+ > ); else Obj = document createElement( input ); Obj setAttribute( type sType); Obj setAttribute( name sName); Obj setAttribute( id sId); return Obj;

　　// xajax createInput creates a new input node under a parent this createInput = function(sParentId sType sName sId) var objParent = this $(sParentId); var objElement = this getInput(sType sName sId); objParent appendChild(objElement);

　　// xajax insertInput creates a new input node before another node this insertInput = function(sBeforeId sType sName sId) var objSibling = this $(sBeforeId); var objElement = this getInput(sType sName sId); objSibling parentNode insertBefore(objElement objSibling);

　　// xajax remove deletes an element this remove = function(sId) objElement = this $(sId); if (objElement parentNode && objElement parentNode removeChild) objElement parentNode removeChild(objElement);

　　//xajax replace searches for text in an attribute of an element and replaces it //with a different text this replace = function(sId sAttribute sSearch sReplace) var bFunction = false;

　　eval( var txt=document getElementById( +sId+ ) +sAttribute); if (typeof txt == function ) txt = txt toString(); bFunction = true; if (txt indexOf(sSearch)> ) var newTxt = ; while (txt indexOf(sSearch) > ) x = txt indexOf(sSearch)+sSearch length+ ; newTxt += txt substr( x) replace(sSearch sReplace); txt = txt substr(x txt length x); newTxt += txt; if (bFunction) eval( newTxt = + newTxt); eval( this $( +sId+ ) +sAttribute+ =newTxt; ); else if (this willChange(sId sAttribute newTxt)) eval( this $( +sId+ ) +sAttribute+ =newTxt; );

// xajax getFormValues() builds a query string XML message from the elements of a form object

　　function Xajax() if (xajaxDebug) this DebugMessage = function(text) alert( Xajax Debug:\\n + text) ;

　　this workId = xajaxWork + new Date() getTime(); this depth = ;

　　if (xajaxDebug) if (!req) this DebugMessage( Request Object Instantiation failed );

　　return req;

　　// xajax $() is shorthand for document getElementById() this $ = function(sId)//$是什么? return document getElementById(sId);

　　// xajax remove deletes an element this remove = function(sId) objElement = this $(sId); if (objElement parentNode && objElement parentNode removeChild) objElement parentNode removeChild(objElement);

　　//xajax replace searches for text in an attribute of an element and replaces it //with a different text this replace = function(sId sAttribute sSearch sReplace) var bFunction = false;

　　// xajax getFormValues() builds a query string XML message from the elements of a form object

　　this call = function(sFunction aArgs sRequestType) var i r postData; if (document body && xajaxWaitCursor) document body style cursor = wait ; if (xajaxStatusMessages == true) window status = Sending Request ; if (xajaxDebug) this DebugMessage( Starting xajax ); if (sRequestType == null) var xajaxRequestType = xajaxDefinedPost; else var xajaxRequestType = sRequestType; var uri = xajaxRequestUri; var value; switch(xajaxRequestType) ca** *ajaxDefinedGet: var uriGet = uri indexOf( ? )== ? ?xajax= +encodeURIComponent(sFunction): &xajax= +encodeURIComponent(sFunction); for (i = ; i<aArgs length; i++) value = aArgs[i]; if (typeof(value)== object ) value = this objectToXML(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 <aArgs length; i++) value = aArgs[i]; if (typeof(value)== object ) value = this objectToXML(value); postData = postData+ &xajaxargs[]= +encodeURIComponent(value); break; default: alert( Illegal request type: + xajaxRequestType); return false; break; r = this getRequestObject(); r open(xajaxRequestType==xajaxDefinedGet? GET : POST uri true); if (xajaxRequestType == xajaxDefinedPost) try r setRequestHeader( Method POST + uri + HTTP/ ); r setRequestHeader( Content Type application/x form urlencoded; charset= + xajaxCharEncoding); catch(e) alert( Your browser does not appear to support asynchronous requests using POST ); return false; r onreadystatechange = function() if (r readyState != ) return;

　　if (r status== ) if (xajaxDebug && r responseText length < ) xajax DebugMessage( Received:\\n + r responseText); else if (xajaxDebug) xajax DebugMessage( Received:\\n + r responseText substr( )+ \\n[long response]\\n </xajax> ); if (r respon***ML) xajax processResponse(r respon***ML); else alert( Error: the XML response that was returned from the server is invalid ); document body style cursor = default ; if (xajaxStatusMessages == true) window status = Invalid XML response error ;

　　delete r; if (xajaxDebug) this DebugMessage( Calling +sFunction + uri= +uri+ (post: + postData + ) ); r send(postData); if (xajaxStatusMessages == true) window status = Waiting for data ; delete r; return true;

　　// Tests if the new Data is the same as the extant data this willChange = function(element attribute newData) if (!document body) return true; var oldData; if (attribute == innerHTML ) tmpXajax = this $(this workId); if (tmpXajax == null) tmpXajax = document createElement( div ); tmpXajax setAttribute( id this workId); tmpXajax style display = none ; tmpXajax style visibility = hidden ; document body appendChild(tmpXajax); tmpXajax innerHTML = newData; newData = tmpXajax innerHTML; tmpXajax innerHTML = ; eval( oldData=document getElementById( +element+ ) +attribute); if (newData != oldData) return true;

　　return false;

　　//Process XML xajaxResponses returned from the request this processResponse = function(xml) if (xajaxStatusMessages == true) window status = Processing ; var tmpXajax = null; xml = xml documentElement; if (xml == null) alert( Error: the XML response that was returned from the server cannot be processed ); document body style cursor = default ; if (xajaxStatusMessages == true) window status = XML response processing error ; return; for (i= ; i<xml childNodes length; i++) if (xml childNodes[i] nodeName == cmd ) var cmd; var id; var property; var data; var search; var type; var before;

　　for (j= ; j<xml childNodes[i] attributes length; j++) if (xml childNodes[i] attributes[j] name == n ) cmd = xml childNodes[i] attributes[j] value; if (xml childNodes[i] attributes[j] name == t ) id = xml childNodes[i] attributes[j] value; if (xml childNodes[i] attributes[j] name == p ) property = xml childNodes[i] attributes[j] value; if (xml childNodes[i] attributes[j] name == c ) type = xml childNodes[i] attributes[j] value; if (xml childNodes[i] childNodes length > ) for (j= ; j<xml childNodes[i] childNodes length; j++) if (xml childNodes[i] childNodes[j] nodeName == s ) if (xml childNodes[i] childNodes[j] firstChild) search = xml childNodes[i] childNodes[j] firstChild nodeValue; if (xml childNodes[i] childNodes[j] nodeName == r ) if (xml childNodes[i] childNodes[j] firstChild) data = xml childNodes[i] childNodes[j] firstChild data; else if (xml childNodes[i] firstChild) data = xml childNodes[i] firstChild nodeValue; else data = ;

　　var objElement = this $(id); try if (cmd== al ) alert(data); if (cmd== js ) eval(data); if (cmd== in ) this include(data); if (cmd== as ) if (this willChange(id property data)) eval( objElement +property+ =data; ); if (cmd== ap ) eval( objElement +property+ +=data; ); if (cm*== ** ) eval( objElement +property+ =data+objElement +property); if (cmd== rp ) this replace(id property search data) if (cmd== rm ) this remove(id); if (cmd== ce ) this create(id data property); if (cmd== ie ) this insert(id data property); if (cmd== ci ) this createInput(id type data property); if (cmd== ii ) this insertInput(id type data property); if (cmd== ev ) eval( this $( +id+ ) +property+ = function() +data+ ; ); if (cmd== ah ) this addHandler(id property data); if (cmd== rh ) this removeHandler(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; document body style cursor = default ; if (xajaxStatusMessages == true) window status = Done ;

cha138/Article/program/Java/hx/201311/25917

知识大全 给大家讲个不错的ajax组件

知识大全给大家讲个不错的ajax组件