ASP.net c# Avoid open the same window twice

http://blog.startq.com/index.php/2013/03/28/prevent-multiple-tabs-on-c-web-applications/

http://stackoverflow.com/questions/10336312/asp-net-c-sharp-avoid-open-the-same-window-twice

http://www.codeproject.com/Articles/35859/Detect-and-prevent-multiple-windows-or-tab-usage-i

 http://jinaldesai.net/stop-sharing-session-state-between-multiple-tabs-of-browser/

Window features in window.open()

The table below lists the string features you can pass into the "feature" parameter of window.open() to manipulate its interface. Most features support a value of true or false, though in general, simply including the name of the feature implies it should be added to the window (yes), while not including it means it shouldn't (no). Separate each feature with a comma (,).

Feature	Description
channelmode	Specifies if window should be opened in channel mode. IE only.
fullscreen	Specifies if window should be opened in full screen mode. IE only.
height	Specifies the height of the window.
left	Specifies the x coordinates of the window in pixels. IE only. See "screenX" as well.
location	Specifies if the location bar of the window should be included.
menubar	Specifies if the menu bar of the window should be included.
resizable	Specifies if window should be resizable.
screenX	Specifies the x coordinates of the window in pixels. NS only. See "left" as well.
screenY	Specifies the y coordinates of the window in pixels. NS only. See "top" as well.
scrollbars	Specifies if window should contain scrollbars
status	Specifies if the status bar of the window should be included
toolbar	Specifies if the toolbar of the window (i.e., reload button) should be included.
top	Specifies the y coordinates of the window in pixels. IE only. See "screenY" as well.
width	Specifies the width of the window.