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("Handler could not be removed")}}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}}