function addEvent(obj, evType, fn){
 if (obj.addEventListener){obj.addEventListener(evType, fn, false);
    return true;} else if (obj.attachEvent){var r = obj.attachEvent("on"+evType, fn);
    return r;} else {return false;}}
	
function removeEvent(obj, evType, fn, useCapture){
  if (obj.removeEventListener){obj.removeEventListener(evType, fn, useCapture);
    return true; } else if (obj.detachEvent){ var r = obj.detachEvent("on"+evType, fn);    return r; } else { alert("Невозможно убрать"); }}
	
function getViewportHeight() {if (window.innerHeight!=window.undefined) return window.innerHeight;if (document.compatMode=='CSS1Compat') return document.documentElement.clientHeight;if (document.body) return document.body.clientHeight;return window.undefined; 
}
function getViewportWidth() {var offset = 17;var width = null;
	if (window.innerWidth!=window.undefined) return window.innerWidth; 
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientWidth; 
	if (document.body) return document.body.clientWidth;}
	
function getScrollTop() {if (self.pageYOffset) 
	{return self.pageYOffset;}
	else if (document.documentElement && document.documentElement.scrollTop){return document.documentElement.scrollTop;}	else if (document.body)	{return document.body.scrollTop;}}
	
function getScrollLeft() {if (self.pageXOffset)	{return self.pageXOffset;}
	else if (document.documentElement && document.documentElement.scrollLeft){return document.documentElement.scrollLeft;	}else if (document.body) {return document.body.scrollLeft;}}