Call parents JavaScript function from Child popup windows

<script
language="Javascript"
type="text/javascript">

function CallAlert()

{

alert("This is parent window's alert function.");

}

</script>

Fig – (2) Javascript on parent window.

<script
language="Javascript"
type="text/javascript">

 

function SetParentWindowsHiddenFieldValue()

{

window.opener.document.getElementById("HiddenField1").value =

document.getElementById("TextBox1").value;

return
false;

}

 

function CallParentWindowFunction()

{

window.opener.CallAlert();

return
false;

}

</script>