function createCorner(name, parent)
{
    if (!document.createElement || !document.appendChild) return;
    el = document.createElement('DIV');
    el.className = 'corner-' + name;
    parent.appendChild(el);
}

function blurb()
{
    if (!document.getElementsByTagName) return;
    var divs = document.getElementsByTagName('DIV');
    for (var i=0; i<divs.length; i++) {
        if (/\bblurb\b/.exec(divs[i].className)) {
            createCorner('nw', divs[i]);
            createCorner('ne', divs[i]);
            createCorner('sw', divs[i]);
            createCorner('se', divs[i]);
        }
    }
}

addLoadEvent(blurb);