function exploreNavigate(e) {
    var keynum;
    var keychar;
    var movedir;
    if(window.event) // IE
    	{
    	keynum = e.keyCode;
    	}
    else if(e.which) // Netscape/Firefox/Opera
    	{
    	keynum = e.which;
    	}
    if (keynum == 37) { movedir = "w" ; }
    else if (keynum == 38) { movedir = "n" ; }
    else if (keynum == 39) { movedir = "e" ; }
    else if (keynum == 40) { movedir = "s" ; }
    if (movedir) {
        document.navform.move.value = movedir ;
        document.navform.submit() ;
        }
    }