how to avoid to open same window of existing website(window) in new tab for eg.. if i have a page www.mysite.com/page1.aspx if i copy this URL and paste in new tab of the browser than a popup or message should be appear(alert-- you have already open this
website)
Noe:-- if we reload or refresh the previous page than alter should not be appear .means only one page can be open at a time
in should be done in scripting only
i need your valuable advice thanks in advance
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