/**

*/
function hasClass(ele,cls) {
	return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
}
/**

*/
function addClass(ele,cls) {
	if (!this.hasClass(ele,cls)) ele.className += " "+cls;
}
/**

*/
function removeClass(ele,cls) {
	if (hasClass(ele,cls)) {
    	var reg = new RegExp('(\\s|^)'+cls+'(\\s|$)');
		ele.className=ele.className.replace(reg,' ');
	}
}
/* from http://www.robertnyman.com/2005/11/07/the-ultimate-getelementsbyclassname/ */
/*
	Written by Jonathan Snook, http://www.snook.ca/jonathan
	Add-ons by Robert Nyman, http://www.robertnyman.com
*/

/* usage example: elArray = getElementsByClassName(document, "a", navClass); */
function getElementsByClassName(oElm, strTagName, strClassName){
	var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	strClassName = strClassName.replace(/\-/g, "\\-");
	var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
	var oElement;
	for(var i=0; i<arrElements.length; i++){
		oElement = arrElements[i];
		if(oRegExp.test(oElement.className))
			arrReturnElements.push(oElement);
	}
	return (arrReturnElements)
}
/**
	Adding a startswith function for all string values.
*/
String.prototype.startsWith = function(str){return (this.match("^"+str)==str)}