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Updating the value of Text box

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I'm showing a popup from a jsp page, when I select any value ( a date ) in the pop up, a text box ( lets name it as dateX ) in the parent window that showed the pop up gets updated with the value selected in the popup.

Now the problem few other text boxes should get updated automatically when ever the value in this textbox ( datex ) gets updated. Can any one throw light on this ?
[ September 29, 2005: Message edited by: Srinivasa Raghavan ]
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In the pop up window code write

window.opener.document.form1.text1.value = urvalue

This will automatically populate the parent window's text box
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If you have multiple tasks that need to be performed in the parent when a selection is made in the popup, rather than have the popup perform them directly create a function in the parent that handles the tasks. Then have the popup call that function with the changed values. This way your popup is decoupled from having to know how the parent is structured.
Don't get me started about those stupid light bulbs.
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