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hi i have added additionalpagehead in sharepoint which will run a javascript functions to show some texts. It is working fine in all the sharepoint pages but it is working in sharepoint popup window also. How can i restrict it from popup windows

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You will need to check if IsDlg query string parameter is not defined. For modal dialogs it is set to "1".

JS code to achieve this client-side:

// GetUrlKeyValue is an existant SharePoint function from init.js
var isDlg = GetUrlKeyValue("IsDlg");

if (!isDlg)
   // show your text here
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