window.addEvent('domready', function()
{
	
	viewport = function()
    {
        var e = window , a = 'inner';
        
        if ( !( 'innerWidth' in window ) )
        {
          a = 'client';
          e = document.documentElement || document.body;
        }
        return { width : e[ a+'Width' ] , height : e[ a+'Height' ] }
    }
	
});