function show_gismap() {
        var url  = location.href;
	var pos = url.indexOf('?');
        if(pos == -1) {
		url = url + '?';
	} else {
		url = url + '&';
        }
        url = url +'gismap=J';
 
        var w = 760;
	var h = 608;
	var px = (screen.width-w)/2;
	var py = (screen.height-h)/2;
    	var wi = window.open(url,
                        'GISMAP', 'dependent=yes,location=no,resizable=yes,scrollbars=yes,status=no,toolbar=no, menubar=no,width='+w+',height='+h+',left='+px+',top='+py);
        wi.focus();
}

function write_gismap(text) {
	document.write('<a href="javascript:show_gismap()">' + text + '</a>');
}