// HOWTO: load LABjs itself dynamically!
// inline this code in your page to load LABjs itself dynamically, if you're so inclined.

(function (global, oDOC, handler) {
    var head = document.getElementsByTagName("head")
      , sOnLoad = "onload"
      , sReadyState = "readyState"
      , sDomContentLoaded = "DOMContentLoaded"
      , sLoaded = "loaded"
      , sComplete = "complete"
      , sOnReadyStateChange = "onreadystatechange";
      , bFalse = false
      , bTrue = true;
    function LABjsLoaded() {
        // do cool stuff with $LAB here
    }

    // loading code borrowed directly from LABjs itself
    setTimeout(function() {
        if ("item" in head) { // check if ref is still a live node list
            if (!head[0]) { // append_to node not yet ready
                setTimeout(arguments.callee, 25);
                return;
            }
            head = head[0]; // reassign from live node list ref to pure node ref -- avoids nasty IE bug where changes to DOM invalidate live node lists
        }
        var scriptElem = oDOC.createElement("script"),
            scriptdone = bFalse;
        scriptElem.type = "text/javascript";
        scriptElem[sOnload] = scriptElem[sOnReadyStateChange] = function () {
            if ((scriptElem[sReadyState] && scriptElem[sReadyState] !== sComplete && scriptElem[sReadyState] !== sLoaded) || scriptdone) {
                return bFalse;
            }
            scriptElem[sOnload] = scriptElem[sOnReadyStateChange] = nNull;
            scriptdone = bTrue;
            LABjsLoaded();
        };
        scriptElem.src = "/path/to/LAB.js";
        head.insertBefore(scriptElem, head.firstChild);
    }, 0);

    // required: shim for FF <= 3.5 not having document.readyState
    if (oDOC[sReadyState] == nNull && oDOC.addEventListener) {
        oDOC[sReadyState] = "loading";
        oDOC.addEventListener(sDOMContentLoaded, handler = function () {
            oDOC.removeEventListener(sDOMContentLoaded, handler, bFalse);
            oDOC[sReadyState] = sComplete;
        }, bFalse);
    }
})(window, document);