<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> <script> window.onload = function () { var obtn = document.getElementById(‘btn‘); obtn.onclick = function () { var xhr = new XMLHttpRequest(); xhr.open(‘GET‘,‘1.txt‘,true); xhr.send(); xhr.onreadystatechange = function () { if(xhr.readyState = 4) { alert(xhr.responseText); } } } } </script> </head> <body> <input type="button" id="btn" value="提交"> </body> </html>
原文：http://www.cnblogs.com/mayufo/p/4296359.html