function getelement(id) {
    var elem, vis;
    if( document.getElementById )
      elem = document.getElementById(id);
    else if( document.all )
            elem = document.all[id];
    else if( document.layers )
      elem = document.layers[id];
    vis = elem.style;
    return vis;
}

function hideInfo() {
    document.getElementById("infoFrame").src = "about:blank"; 
    var info = getelement('info');
    info.display='none';
    
    var displacer = getelement('displacer');
    displacer.display='none';
}
function showInfo(adress) {
    document.getElementById("infoFrame").src = adress; 
    
    var info = getelement('info');
    info.display='block';
    
    var displacer = getelement('displacer');
    displacer.display='block';
}
function openAddDive() {
    var lat = document.getElementById("new_lat").value;
    var lng = document.getElementById("new_lng").value;
    showInfo("new.php?lat="+lat+"&lng="+lng);
}
function directLink() {
    var link_lat = map.getCenter().lat();
            link_lat = Math.round(link_lat.toString()*100000)/100000;
      var link_lon = map.getCenter().lng();
            link_lon =  Math.round(link_lon.toString()*100000)/100000;
      var link_zoom = map.getZoom();
            link_zoom =  Math.round(link_zoom.toString()*100000)/100000;

    var link = "http://www.stranddyk.dk/index.php?lat="+link_lat+"&lon="+link_lon+"&zoom="+link_zoom;
    
    window.location.href = link;
}