Introduction to methods of dynamically creating script tags to achieve cross-domain resource access_javascript skills

login.html

复制代码 代码如下:

<script> <p>function request(id,url){<br>     oScript = document.getElementById(id);<br>     var head = document.getElementsByTagName("head").item(0);<br>     if (oScript) {<br>        head.removeChild(oScript);<br>     }<br>     oScript = document.createElement("script");<br>     oScript.setAttribute("src", url);<br>     oScript.setAttribute("id",id);<br>     oScript.setAttribute("type","text/javascript");<br>     oScript.setAttribute("language","javascript");<br>     head.appendChild(oScript);<br>     return oScript;<br>}</p> <p> </p> <p>function userLogin(){<br>    var username=document.getElementById('name').value;<br>    var password=document.getElementById('password').value;<br><br>    //alert(username "--" password);<br><br> var url='http://127.0.0.1:8080/EasyCMS/login.jsp?name=' encodeURI(username) '&password=' encodeURI(password) '&s=' (new Date()).getTime();</p> <p> //alert("url=" url);<br>    var login=request("loginScript",url);<br>}</p> <p>function myloginState(state){</p> <p>      alert("ret:" state);<br>      if (state==0)<br>   {<br>  alert("登陆成功");<br>   }<br>   else<br>   {<br>        alert("登陆失败");<br>   }</p> <p>}</p> <p></script>

用户名：
密码：

login.jsp

复制代码 代码如下:

<%@ 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");
 <%
}
%>