function windowOpener(windowHeight, windowWidth, windowName, windowUri)
{
    var centerWidth = (screen.availWidth - windowWidth-50) / 2;
    var centerHeight = (screen.availHeight - windowHeight) / 2;

    newWindow = window.open(windowUri, windowName, 'status=1,resizable=0,width=' + windowWidth + 
        ',height=' + windowHeight + 
        ',left=' + centerWidth + 
        ',top=' + centerHeight);

    newWindow.focus();
    //return newWindow.name;
}