php&javascript:how to disable close in popup window?

  • Thread starter Thread starter cutegirl666888222
  • Start date Start date
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cutegirl666888222

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hi, I have a popup window where I make a small calculation then return the value to the parent page, the problem is I dont want the user to be able to hit close button from the popup bar, but only after clicking on the button that I made for calculation
 
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