XMLHttpRequest - Change Value getElementById

Hi,

I want the button on the second page to change the value of the button in the first page,this is my code:

FILE 1: Index.html(page one):

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 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"

   "http://www.w3.org/TR/html4/strict.dtd">
 
<html lang="en">

<head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

    <title>Eran Exercise</title>

    <link rel="stylesheet" type="text/css" href="design.css" />

    <script src="new_file.js"></script>
 
</head>

<body>
 
        <div class="wrapper">
 
              <form> 

<input type="button" id="id200" value="New Window!" onClick="window.open('page2.html','mywindow','width=400,height=200')"> 
 
</form> 
 
                        </div>
 
</body>

</html>

FILE 2:new_file.js(the js file)

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 function changeLink()

{

var someOtherName="after click";
 
xmlhttp=new XMLHttpRequest();
 
xmlhttp.onreadystatechange=function()

  {

  if (xmlhttp.readyState==4 && xmlhttp.status==200)

    {

    document.getElementById("id200").value = someOtherName;

    }

  }

xmlhttp.open("GET","index.html");

xmlhttp.send();

}

FILE 3:page2.html(page two)

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 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"

   "http://www.w3.org/TR/html4/strict.dtd">
 
<html lang="en">

<head>

<script src="new_file.js"></script>

 </head>
 
<body>

<input type="button" id="id100" onclick="changeLink()" value="Change link">

</body>

</html>

Thanks!

Nov 5 '11 #1

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1639

Dormilich

8,658

Expert Mod 8TB

as you expect it, that’s not possible.

JavaScript only works within a single page, there is no JavaScript-to-JavaScript communication between two loaded pages.

the only thing that were possible is to call the second page by the first page and passing URL parameter(s) which can be read and processed by JavaScript.

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XMLHttpRequest - Change Value getElementById

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