Is there a way to open a blank window in Asp?

No I dont believe so. JS will do it for you, here is the function:

    var newWindow
    function openNewWin(pageURL, pageName, width, height, top, left)
    {
          newWindow = window.open(pageURL, pageName,"width=" + width + ",height=" + height + ",top=" + top + ",left=" + left + ",scrollbars=0, resizable=1,toolbar=1,location=1,status=1,menubar= 0");
          newWindow.focus()
    }

and here is how you would call it:

<a href="#" onClick="openNewWin('pagename.asp','windowName',42 0,250,150,150);">open win</a>

Wind is your friend
Matt

Yes you can do..Using javascript window object...
window.open(' ','blank');