Private anon init function for returning a client view port dimensions array.

GetViewportDimensions.js

    GetViewportDimension: function()
    {

        var ViewPortArr = [];

          // Standards compliant client
        if ( typeof window.innerWidth != 'undefined' )              
        {
            ViewPortArr.Width = window.innerWidth
            ViewPortArr.Height = window.innerHeight
        } // IE6 compliant mode
        else if ( typeof document.documentElement != 'undefined'    
        && typeof document.documentElement.clientWidth !=
        'undefined' && document.documentElement.clientWidth != 0 )
        {
            ViewPortArr.Width = document.documentElement.clientWidth
            ViewPortArr.Height = document.documentElement.clientHeight
        } // IE6 older, other
        else    
        {
            ViewPortArr.Width = document.getElementsByTagName( 'body' )[0].clientWidth
            ViewPortArr.Height = document.getElementsByTagName( 'body' )[0].clientHeight
        }

        return ViewPortArr;
    }