ajax访问servlet打印xmlhttp.status状态总是错误

Question

//alert(xmlhttp.status) 一直报这个错误，请朋友们帮忙解决一下。
SCRIPT16389: Unspecified error.
ajax, line 28 character 4
SCRIPT16389: Unspecified error.
ajax, line 28 character 4
SCRIPT16389: Unspecified error.
ajax, line 28 character 4
SCRIPT16389: Unspecified error.
ajax, line 28 character 4

//这个是jsp文件

function myRequest1(){ var xmlhttp; if(window.XMLHttpRequest){ // code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp = new XMLHttpRequest(); }else{ // code for IE6, IE5 xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); } alert(xmlhttp.status); xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.getElementById("myInfo").innerHTML=xmlhttp.responseText; } } xmlhttp.open("GET","ajax.do?method=getMyInfo&t="+Math.random(),true); xmlhttp.send(); }

ajax样例

Answer 1

xmlhttp.send(null);这杨试试，