function domApi()
{
	this.domLoad = [];
	this.domLoaderSet = false;
	this.addEvent = addEvent;
	this.addDomLoadEvent = addDomLoadEvent;
	this.domLoaded = domLoaded;
	this.getElementsByClassName = getElementsByClassName;
}

function addEvent(elem, act, func) {
    if(typeof elem == 'string') {
        elem = document.getElementById(elem);
    }
    if(!elem) return false;

    if (act == 'domload' && elem == window) {
        this.addDomLoadEvent(func);
    }

    if(window.addEventListener) {
       elem.addEventListener(act, func, false);
    }
    else if(window.attachEvent) {
        elem.attachEvent('on'+act, func);
    }
    else return false;
    return true;
};
function addDomLoadEvent(func) {

    domApi.domLoad.push(func);
    if (domApi.domLoaderSet) {
        return false;
    }

	if (document.addEventListener) {
		document.addEventListener("DOMContentLoaded", domApi.domLoaded, null);
    }
	if (/KHTML|WebKit/i.test(navigator.userAgent)) {
		var _timer = setInterval(function()	{
			if (/loaded|complete/.test(document.readyState)) {
				clearInterval(_timer);
				delete _timer;
				domApi.domLoaded();
			}
		}, 25);
	}
   this.addEvent(window, 'load', domApi.domLoaded);
   domApi.domLoaderSet = true;
};

function domLoaded() {

    if (arguments.callee.done) return;
    arguments.callee.done = true;

    for (var i = 0;i < domApi.domLoad.length;i++) {
        domApi.domLoad[i]();
    }
};
/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/
function getElementsByClassName(className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};


domApi = new domApi();