动态创建script标签实现跨域资源访问的方法介绍
作者：
login.html
<script>
function request(id,url){
oScript = document.getElementById(id);
var head = document.getElementsByTagName("head").item(0);
if (oScript) {
head.removeChild(oScript);
}
oScript = document.createElement("script");
oScript.setAttribute("src", url);
oScript.setAttribute("id",id);
oScript.setAttribute("type","text/javascript");
oScript.setAttribute("language","javascript");
head.appendChild(oScript);
return oScript;
}
function userLogin(){
var username=document.getElementById('name').value;
var password=document.getElementById('password').value;
//alert(username+"--"+password);
var url='http://127.0.0.1:8080/EasyCMS/login.jsp?name='+encodeURI(username)+'&password='+encodeURI(password)+'&s=' + (new Date()).getTime();
//alert("url="+url);
var login=request("loginScript",url);
}
function myloginState(state){
alert("ret:"+state);
if (state==0)
{
alert("登陆成功");
}
else
{
alert("登陆失败");
}
}
</script>
<body>
用户名：<input name="name" id="name" type="text" />
密码：<input name="password" id="password" type="password" />
<input name="" value="login" type="button" onclick="userLogin();" />
</body>
login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String name=request.getParameter("name");
String password=request.getParameter("password");
if (name.equals("admin") && password.equals("admin"))
{
request.getSession().setAttribute("admin","admin");
%>
myloginState("0");
<%
}
else
{
%>
myloginState("1");
<%
}
%>