Hi Bebu,
In IE, the option to open a page in a new tab is user controlled and therefore cannot be programmatically controlled. More information on that subject can be found at:
http://stackoverflow.com/questions/427479/programmatically-open-new-pages-on-tabs
http://msdn.microsoft.com/en-us/library/ie/ms534659%28v=vs.85%29.aspx
Please feel free to contact me if you have any questions.