Web Development

<br />
<script language=javascript><br />
    function OnButton1()<br />
    {<br />
            document.Form1.action = "onizleme.jsp"<br />
            document.Form1.target = "_blank";	     // Open in a new window<br />
            document.Form1.submit();			// Submit the page<br />
            return true;<br />
    }<br />
<br />
    function OnButton2()<br />
    {<br />
            document.Form1.action = "gonder.jsp"<br />
            document.Form1.submit();			// Submit the page<br />
            return true;<br />
    }<br />
    </script><br />
    <noscript>You need Javascript enabled for this to work</noscript><br />
    <br />
   <br />
   <!-- create the form --><br />
    <form name=Form1 method=post><br />
<br />
    <!-- Add the data entry bits --><br />
    Your Name <INPUT type="text" name=txb><br><br />
<br />
    <!-- Add some buttons --><br />
    <INPUT type="button" value="Preview" name=button1 onclick="return OnButton1();"><br />
    <INPUT type="button" value="Submit" name=button2 onclick="return OnButton2();"><br />
<br />
    <!-- close the form --><br />
    </form><br />

<br />
///JScript<br />
var childWin = null;<br />
<br />
function an_button_click()<br />
{<br />
    childWin = window.open("anurl");<br />
<br />
    //it doesn't work<br />
    childWin.on unload = child_onunload;//<br />
}<br />
<br />
//NOT invoked when child window closed<br />
function child_onunload()<br />
{<br />
  alert("Child unload!!!");<br />
}<br />
<br />