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Popup if a certain input form's checkbox is checked

deloused asked
Last Modified: 2010-05-18
I need to have a new browser window open (via a popup or otherwise) if a user checks a checkbox on a page.  If the user doesn't check the popup, I would like for the popup to not happen.  

The page is a simple input form that users enter to recieve more information.  I have the popup part figured out, but I can't seem to get it to fire only when the checkbox is checked.

I've attached my sample code below to give an idea, I just need to add an if statement based to determine if the checkbox is checked and whether or not to fire the popup event.  Thanks in advance

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<!-- Begin
function popUp(URL) 
        day = new Date();
        id = day.getTime();
        eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=1,width=600,height=800,left = 0,top = 0');");
// End -->
    <form method="POST">
	<input  id="CheckboxForPopup" name="CheckboxForPopup" type="checkbox" value="1"   /> 
	<input style="height: 35px" type="submit" name="submit" value="Submit" onclick="javascript:popUp('popup.html')" />

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