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Introduction to the method of dynamically creating a script tag to achieve Cross-domain resource access

Source: Internet
Author: User
Tags script tag
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  This article is mainly on the dynamic creation of the script tag to achieve Cross-domain resource access methods are introduced, the need for friends can come to the reference, I hope to be helpful to everyone

Login.html   Code is as follows: <script>   function Request (Id,url) {     oscript = document.getelement Byid (ID);      var head = document.getElementsByTagName ("Head"). Item (0);      if (oscript) {        Head.removechild (oscript);      }   &NB Sp  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;   &NB Sp 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 ("Login succeeded");   &nbsp}    else    {&N Bsp       Alert ("Landing failure");   &NBSP}  }   </script> <body> user name: <input name= "name" id= "name" type= "text"/> Password: <i Nput name= "password" id= "password" type= "password"/> <input name= "" value= "Login" type= "button" onclick= " Userlogin (); "/> </body>     login.jsp    code is as follows: <%@ 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");   <%  }%>  

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