XMLHttpRequest of ajax
调用 function(Url) {var XML = new XMLHttpRequest();XML.onreadystatechange = function() {if (XML.readyState == 4){if (XML.status == 200){//XML.responseTe
调用 function(Url) {var XML = new XMLHttpRequest();XML.onreadystatechange = function() {if (XML.readyState == 4){if (XML.status == 200){//XML.responseTe