AJAX and javascriptAJAX in javascript

AJAX and javascriptAJAX in javascript
Compatible with XMLHttpRequest objects:

Var xhr = null; if (window. XMLHttpRequest) {// non-IE browser xhr = window. XMLHttpRequest;} else if (window. activeXObject) {// IE browser try {// High Version, supported by msxml3.dll + xhr = new ActiveXObject ("Msxml2.XMLHTTP");} catch (e) {try {// low version, versions earlier than msxml2.6 use xhr = new ActiveXObject ("Microsoft. XMLHTTP ");} catch (e) {alert (" The ActiveXObject object cannot be created in IE browser! ");}}}

AJAX processing functions:

Xhr. open ("POST", url, true); xhr. setRequestHeader ("Content-Type", "application/x-www-form-urlencoded"); xhr. onreadystatechange = stateChangeHandler; xhr. send (); // var name = "clf"; xhr. send (name); function stateChangeHandler () {if (xhr. readystate = 4 & xhr. status = 200) {var obj = document. getElementById ("targetDiv"); obj. innerHTML = xhr. responseText ;}}