function addLoadEvent(func)
{
    var oldonload = window.onload;
    if (typeof window.onload != 'function')
        window.onload = func;
    else
    {
        window.onload = function()
        {
            oldonload();
            func();
        }
    }
}

// Create a tootlip
function createTooltip(evt, id, title)
{
    deleteTooltip(id)
    
    evt = (evt) ? evt : ((window.event) ? window.event : "");
    
    pos_x = mouseX(evt);
    pos_y = mouseY(evt);
    
    el = document.createElement('div');
    el.id = 'tooltip' + id;
    el.className = 'sbdb_tooltip'
    el.style.left = (pos_x + 18) + 'px';
    el.style.top = (pos_y + 10) + 'px';
    
    el.innerHTML = title;
    
    document.getElementsByTagName('body')[0].appendChild(el);
}




// Remove a tooltip
function deleteTooltip(id)
{
    if (tmp = document.getElementById('tooltip' + id))
        document.getElementsByTagName('body')[0].removeChild(tmp);
}


// Make external links
function externalLinks()
{
    if (!document.getElementsByTagName)
        return;
    var anchors = document.getElementsByTagName("a");
    for (var i=0; i<anchors.length; i++)
    {
        var anchor = anchors[i];
        if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external")
            anchor.target = "_blank";
    }
} 
addLoadEvent(function() {externalLinks()});


// Event functions
function mouseX(evt)
{
    if (evt.pageX)
        return evt.pageX;
    else if (evt.clientX)
        return evt.clientX + (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft);
    else
        return null;
}
function mouseY(evt) {
    if (evt.pageY) return evt.pageY;
    else if (evt.clientY)
        return evt.clientY + (document.documentElement.scrollTop ?document.documentElement.scrollTop : document.body.scrollTop);
    else
        return null;
}