This article describes the usage of AJAX in JavaScript. Share it for your reference. The specific analysis is as follows:
Obtain XMLHttpRequest object compatible:
var xhr = null; if(window.XMLHttpRequest){ //Non-IE browser xhr = window.XMLHttpRequest; }else if(window.ActiveXObject){ //IE browser try{ //Higher version, supported by msxml3.dll+xhr = new ActiveXObject("Msxml2.XMLHTTP"); }catch(e){ try{ // Lower version, xhr = new ActiveXObject("Microsoft.XMLHTTP"); }catch(e){ try{ // Lower version, msxml2.6 versions below use xhr = new ActiveXObject("Microsoft.XMLHTTP"); }catch(e){ alert("IE browser cannot create ActiveXObject object!"); } } }AJAX processing function:
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; } }I hope this article will be helpful to everyone's JavaScript programming.