Using showModalDialog() with an ASP.NET page that does PostBack opens another window

If you have an ASP.NET page (.aspx) opened with the JavaScript showModalDialog() function and inside that page there is a form doing PostBack, when the PostBack is being done the page loads in another (popup) window. The easiest way to prevent this is to add the following tag inside the <HEAD></HEAD> tags of the ASP.NET page:

<base target="_self">

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