How do I maximize popup javascript page to full screen

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C#

ASP.NET

Javascript

I am using a javascript in order to disable the controls of a page.. the code is below:::

server side to call javascript::
btnLogin.Attributes.Add("onclick", "popUp('" + responseURL + "')");

clientside:::

var popUp = function (page){
        window.open(page, "Index", 'toolbar=0,scrollbars=yes,location=0,statusbar=0,menubar=0,resizable=1,width=1500,height=7500,left = 710,top = 290');
     }

here, in order to maximize the IE browser to take whole of the screen, i am using width and height.. i had done googleing.. It had told me to set fullscreen=yes.. on removing width and height and setting fullscreen=yes, i got all the content in the required fashion but screen is not full . unfortunately, its not working in my code... is there a way to maximize the browser as os loads??