Close the Current window while transfer from one page to another page

Hi Experts,
I am using gridview with template field for diaplay data. In the template field there is a link button for edit the quantity. While clicking link button i am calling a javascript for open a new window. Meanwhile i need to close current web page while it transfers.. Though i am using window.self.close() in function, it dosen't works for me.. My script function is given below

function editQuantity(order_id)
{
    var scrWidth = screen.width;
    var scrHeight = screen.height;

    var winWidth = 500;
    var winHeight = 175;
      
    var winLeft = (scrWidth - winWidth)/2;
    var winTop = (scrHeight - winHeight)/2;
      
    var strFeatures = "toolbar=0,location=0,width=" + winWidth + ", height=" + winHeight + ", top=" + winTop + ", left=" + winLeft + ", status=0, scrollbars=0";
    //alert('../AddPartNumbertoCart.aspx?Partno='+partno+'&Description='+desc);
    window.self.close();
    window.open('../ShoppingCart/EditCartQuantity.aspx?order_id='+order_id, 'EditQuantity', strFeatures);
    return false;
}      

Any help would be appreciated.
Thanks in advance.
Regards,
RaviStart Free Trial