New window settings using javascript

popupwindow option in asp.net(Code behind)
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string URL ="asppage.aspx";

Response.Write("<script language=javascript>window.open('" + URL + "',null,'left=100, top=100,width=657,height=500,status=no, resizable= no, scrollbars= yes, toolbar= no,location= no, menubar= no,titlebar=0')</script>");

Close window option in asp.net(Code behind)
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Response.Write("<script language='javascript'> { window.close();}</script>");