/**
 * X-browser event handler attachment and detachment
 * @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");
	}
}
/**
 * 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() 
{
	if (window.innerWidth!=window.undefined) return window.innerWidth; 
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientWidth; 
	if (document.body) return document.body.clientWidth; 
	return window.undefined; 
}
function Querystring(targetUrl)
{
	// get the query string, ignore the ? at the front.
	//var querystring = ((targetUrl == null) || (targetUrl == "")) ? location.search.substring(1,location.search.length) : targetUrl;
	var querystring =targetUrl.split('?');
	var args = querystring[1].split('&'); // parse out name/value pairs separated via &

	// split out each name = value pair
	for (var i=0;i<args.length;i++)
	{
		var pair = args[i].split('=');

		// Fix broken unescaping
		temp = unescape(pair[0]).split('+');
		name = temp.join(' ');

		temp = unescape(pair[1]).split('+');
		value = temp.join(' ');

		this[name]=value;
	}
	this.get=Querystring_get;
}
function Querystring_get(strKey,strDefault)
{
	var value=this[strKey];
	if (value==null)
	{
		value=strDefault;
	}
	return value;
}