function addEvent(elem, evType, fn) {
	if (elem.addEventListener) {
		elem.addEventListener(evType, fn, false);
	}
	else if (elem.attachEvent) {
		elem.attachEvent('on' + evType, fn)
	}
	else {
		elem['on' + evType] = fn
	}
}

if(document.getElementsByClassName) {

	getElementsByClass = function(classList, node) {    
		return (node || document).getElementsByClassName(classList)
	}

} else {

	getElementsByClass = function(classList, node) {			
		var node = node || document,
		list = node.getElementsByTagName('*'), 
		length = list.length,  
		classArray = classList.split(/\s+/), 
		classes = classArray.length, 
		result = [], i,j
		for(i = 0; i < length; i++) {
			for(j = 0; j < classes; j++)  {
				if(list[i].className.search('\\b' + classArray[j] + '\\b') != -1) {
					result.push(list[i])
					break
				}
			}
		}
	
		return result
	}
}
function addClass(o, c){
    var re = new RegExp("(^|\\s)" + c + "(\\s|$)", "g")
    if (re.test(o.className)) return
    o.className = (o.className + " " + c).replace(/\s+/g, " ").replace(/(^ | $)/g, "")
}
 
function removeClass(o, c){
    var re = new RegExp("(^|\\s)" + c + "(\\s|$)", "g")
    o.className = o.className.replace(re, "$1").replace(/\s+/g, " ").replace(/(^ | $)/g, "")
}
function toggle(el) {
    el.style.display = (el.style.display == 'block') ? 'none' : 'block'
}
function insertAfter(parent, node, referenceNode) {
    parent.insertBefore(node, referenceNode.nextSibling);
}
inArray = Array.prototype.indexOf ?
    function (arr, val) {
        return arr.indexOf(val) != -1
    } :
    function (arr, val) {
        var i = arr.length
        while (i--) {
            if (a[i] === val) return true
        }
        return false
    }
// возвращает cookie если есть или undefined
function getCookie(name) {
	var matches = document.cookie.match(new RegExp(
	  "(?:^|; )" + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"
	))
	return matches ? decodeURIComponent(matches[1]) : undefined 
}

// уcтанавливает cookie
function setCookie(name, value, props) {
	props = props || {}
	var exp = props.expires
	if (typeof exp == "number" && exp) {
		var d = new Date()
		d.setTime(d.getTime() + exp*1000)
		exp = props.expires = d
	}
	if(exp && exp.toUTCString) { props.expires = exp.toUTCString() }

	value = encodeURIComponent(value)
	var updatedCookie = name + "=" + value
	for(var propName in props){
		updatedCookie += "; " + propName
		var propValue = props[propName]
		if(propValue !== true){ updatedCookie += "=" + propValue }
	}
	document.cookie = updatedCookie

}

// удаляет cookie
function deleteCookie(name) {
	setCookie(name, null, { expires: -1 })
}
function byId(node) {
        return typeof node == 'string' ? document.getElementById(node) : node
}
function smethods(obj){
     var result = "";
     for (var i in obj) // обращение к свойствам объекта по индексу
         result += "." + i + " = " + obj[i] + "\r\n";
     return result;
 }