/** * COMMON DHTML FUNCTIONS * These are handy functions I use all the time. * * By Seth Banks (webmaster at subimage dot com) * http://www.subimage.com/ * * Up to date code can be found at http://www.subimage.com/dhtml/ * * This code is free for you to use anywhere, just keep this comment block. *//** * X-browser event handler attachment and detachment * TH: Switched first true to false per http://www.onlinetools.org/articles/unobtrusivejavascript/chapter4.html * * @argument obj - the object to attach event to * @argument evType - name of the event - DONT ADD "on", pass only "mouseover", etc * @argument fn - function to call */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");  }}/** * Code below taken from - http://www.evolt.org/article/document_body_doctype_switching_and_more/17/30655/ * * Modified 4/22/04 to work with Opera/Moz (by webmaster at subimage dot com) * * Gets the full width/height because it's different for most browsers. */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; }/** * Gets the real scroll top */function getScrollTop() {	if (self.pageYOffset) // all except Explorer	{		return self.pageYOffset;	}	else if (document.documentElement && document.documentElement.scrollTop)		// Explorer 6 Strict	{		return document.documentElement.scrollTop;	}	else if (document.body) // all other Explorers	{		return document.body.scrollTop;	}}function getScrollLeft() {	if (self.pageXOffset) // all except Explorer	{		return self.pageXOffset;	}	else if (document.documentElement && document.documentElement.scrollLeft)		// Explorer 6 Strict	{		return document.documentElement.scrollLeft;	}	else if (document.body) // all other Explorers	{		return document.body.scrollLeft;	}}