/*
    Developed by Robert Nyman, http://www.robertnyman.com
    Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/
var getElementsByClassName = function (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);
};



function Is() {
	agent = navigator.userAgent.toLowerCase();
	this.major = parseInt(navigator.appVersion);
	this.minor = parseFloat(navigator.appVersion);
	this.ns = ((agent.indexOf('mozilla') != -1) &&
	(agent.indexOf('spoofer') == -1) &&
	(agent.indexOf('compatible') == -1) &&
	(agent.indexOf('opera') == -1) &&
	(agent.indexOf('webtv') == -1) &&
	(agent.indexOf('hotjava') == -1));
	this.ns2 = (this.ns && (this.major == 2));
	this.ns3 = (this.ns && (this.major == 3));
	this.ns4 = (this.ns && (this.major == 4));
	this.ns6 = (this.ns && (this.major >= 5));
	this.ie = ((agent.indexOf("msie") != -1) &&
	(agent.indexOf("opera") == -1));
	this.ie3 = (this.ie && (this.major < 4));
	this.ie4 = (this.ie && (this.major == 4) &&
	(agent.indexOf("msie 4") != -1));
	this.ie5 = (this.ie && (this.major == 4) &&
	(agent.indexOf("msie 5.") != -1) &&
	(agent.indexOf("msie 5.5") == -1) &&
	(agent.indexOf("mac") == -1));
	this.iem5 = (this.ie && (this.major == 4) &&
	(agent.indexOf("msie 5.") != -1) &&
	(agent.indexOf("mac") != -1));
	this.ie55 = (this.ie && (this.major == 4) &&
	(agent.indexOf("msie 5.5") != -1));
	this.ie6 = (this.ie && (this.major == 4) &&
	(agent.indexOf("msie 6.") != -1));
	this.ie7 = (this.ie && (this.major == 4) &&
	(agent.indexOf("msie 7.0b") != -1));
	this.nsdom = (this.ns4 || this.ns6);
	this.ie5dom = (this.ie5 || this.iem5 || this.ie55);
	this.iedom = (this.ie4 || this.ie5dom || this.ie6);
	this.w3dom = (this.ns6 || this.ie6 ||this.ie7);
}
var is = new Is();