<!--
    var canw = null ;
    var datalink = null ;
    function openWin( u )
    {
        if( !canw || canw.closed || u!=datalink )
        {
        canw = createWindow( u, "viewer", 600, 600, 1) ;
        datalink = u ;
        }
        canw.focus() ;        
    }
    function createWindow(u,n,w,h,r)
    {
        var args="width="+w+",height="+h+",resizable=yes,scrollbars=yes,status=0";    
        var can = window.open(u,n,args)
        if( can != null )
        {
           if (can.opener == null)
           {
               can.opener =  self ;
           }
        }
        return can;
    }
//-->