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javascript - How to call JS function through ajax call - Stack Overflow

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I want to call a jsp file through ajax post call. So I've done below code -

  xmlhttp=new XMLHttpRequest();

   xmlhttp.onreadystatechange=function()
   {
   if (xmlhttp.readyState==4 && xmlhttp.status==200)
     {  
    document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
   }
   }

   var params = "report_id=0&id=1234567890";
  xmlhttp.open("POST","/test/jsp/test.jsp",true);
  xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");

      xmlhttp.setRequestHeader("Content-length", params.length);
      xmlhttp.setRequestHeader("Connection", "close");
    xmlhttp.send(params);
   }
   </script>
    </head>
<body onload="loadXMLDoc()">
 <div id="myDiv"></div>

Now test.jsp looks like below -

  <html>  
  <head>
   <script language="JavaScript">
   function hello()
   {
   alert("Hello");
   //Do my stuff
    }
   </script>
     <title>test Page</title>

  </head>
    <body topmargin="0" leftmargin="0" onload="hello()">
  <form name="mainForm" >
  </form>
  </body>
  </html>

Issue is, I'm not getting alert message when opening my first html page. What is wrong here and what needs to be done?

I want to call a jsp file through ajax post call. So I've done below code -

  xmlhttp=new XMLHttpRequest();

   xmlhttp.onreadystatechange=function()
   {
   if (xmlhttp.readyState==4 && xmlhttp.status==200)
     {  
    document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
   }
   }

   var params = "report_id=0&id=1234567890";
  xmlhttp.open("POST","/test/jsp/test.jsp",true);
  xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");

      xmlhttp.setRequestHeader("Content-length", params.length);
      xmlhttp.setRequestHeader("Connection", "close");
    xmlhttp.send(params);
   }
   </script>
    </head>
<body onload="loadXMLDoc()">
 <div id="myDiv"></div>

Now test.jsp looks like below -

  <html>  
  <head>
   <script language="JavaScript">
   function hello()
   {
   alert("Hello");
   //Do my stuff
    }
   </script>
     <title>test Page</title>

  </head>
    <body topmargin="0" leftmargin="0" onload="hello()">
  <form name="mainForm" >
  </form>
  </body>
  </html>

Issue is, I'm not getting alert message when opening my first html page. What is wrong here and what needs to be done?

Share Improve this question asked Oct 4, 2013 at 20:39 PakiraPakira 2,0213 gold badges27 silver badges57 bronze badges 1
  • possible duplicate of Executing <script> elements inserted with .innerHTML – Quentin Commented Oct 4, 2013 at 20:44
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2 Answers 2

Reset to default 2

Instead of trying with onload function, use ready function as

    $( document ).ready(function() 
    {
        //here you can call hello function
    })

you will not get javascript executed when you are making ajax call like this.

Once ajax call is made you should trigger a function on main page not on ajax page

 $.ajax({
    type: "POST",
    url: "test.jsp",

    success: function(){
        hello();
    },
    error: function(){
        alert("error");
    }
});
function hello()
{
}
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