Ajax局部刷新的步骤（post）提交

1、获取XMLHttpRequest对象，function checkName(){var xhr=null;if（window.XMLHttpRequest）{xhr=new XMLHttpRequest();}else{xhr=new ActiveXObject("Microsoft.XMLHttp");}return xhr;}

3、xhr.onreadystatechange=function(){if(xhr.readyState==4){var text=xhr.responseText;$("s").innerHTML=text;}}xhr.send("name="+name);

5、<span></span><span id="s"></span><稆糨孝汶;br/>密码：<input type="password" name="psw"><br/><input type="button" name="submit" value="注册"></fieldset></form></body>