// gets inner text of an element
function cc_getText(obj) {
    if(typeof(obj)=="string") {
        var o = document.getElementById(obj);
        if(o) return cc_getTextFn(o);
        else {
            objArray = getElementsByClassName(obj);
            return cc_getTextFn(objArray[0]);
        }
    }
    else return cc_getTextFn(obj);
}
function cc_getTextFn(obj) {
    if(!obj) return;
    if(obj.innerHTML) return obj.innerHTML;
    if(obj.innerText) return obj.innerText;
    if(obj.value) return obj.value;
    if(obj.nodeValue) return obj.nodeValue;
}
// sets inner text of an element - TODO make this w3c compliant
function cc_setText(obj,str) {
    if(typeof(obj)=="string") {
        var o = document.getElementById(obj);
        if(o) cc_setTextFn(o,str);
        else {
            objArray = getElementsByClassName(obj);
            for(var i = 0; i < objArray.length; i++) {
                cc_setTextFn(objArray[i],str);
            }
        }
    }
    else cc_setTextFn(obj,str);
}
function cc_setTextFn(obj,str) {
    if(!obj) return;
    obj.innerHTML = str;
    return obj;
}
// finds an ancestor element by matching attribute
function cc_getAncestor(obj,strAtt,strVal) {
    obj = obj.parentNode;
    if(obj) {
        if(obj[strAtt] && obj[strAtt].match(strVal)) return obj;
        else if (obj.nodeName == "BODY") return; // prevent infinite recursion by stopping at body tag
        else return cc_getAncestor(obj,strAtt,strVal);
    }
    else return;
}
// finds an ancestor element by matching attribute
function cc_getChild(obj) {
    while(obj.childNodes.length > 0) {
        obj = obj.childNodes[0];
    }
    return obj;
}
/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/
/*
    Hacked about a bit by Nathan Lawrence
*/
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) {

	    if(typeof(document.cc_objClassArrays)=="undefined") document.cc_objClassArrays = new Array();
	    else {
	        if(document.cc_objClassArrays[className]) {
	            return document.cc_objClassArrays[className];
            }
	    }



			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);
				}
			}
            document.cc_objClassArrays[className] = returnElements;
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
}