function windowHeight()
{
	if (typeof(window.innerHeight) == 'number')
		return window.innerHeight;
	else if (document.documentElement && document.documentElement.clientHeight)
	{
		return document.documentElement.clientHeight;
	}
	else if (document.body && document.body.clientHeight )
	{
		return document.body.clientHeight;
	}

	return 0;
}

function correctHeights()
{
	var bdiv=document.getElementById('body');
	var hdiv=document.getElementById('header');

	if (!bdiv || !hdiv)
		return;

	var viewporth=windowHeight();

	if (!bdiv.origHeight)
		bdiv.origHeight=bdiv.offsetHeight;

	if (bdiv.origHeight < (viewporth - hdiv.offsetHeight - 2))
	{
		var minh= (viewporth - hdiv.offsetHeight - 2) + "px";
		bdiv.style.height=minh;
		bdiv.firstChild.style.height=minh;
	}
}

var ct;

function resizeWindow()
{
	if (ct)
		clearTimeout(ct);

	var bdiv=document.getElementById('body');
	bdiv.style.height='auto';
	bdiv.firstChild.style.height='auto';
	bdiv.origHeight=0;

	ct=setTimeout('correctHeights()', 10);
}

function addEvent(element, eventname, func, use_capture)
{
	if (element.addEventListener) 
	{
		element.addEventListener(eventname, func, use_capture);
		return true;
	}
	else if (element.attachEvent)
	{
		var r=element.attachEvent('on'+eventname, func);
		return r;
	}
	else
	{
		element['on'+eventname]=func;
		return true;
	}

	return false;
}

function removeEvent(element, eventname, func, use_capture)
{
	if (element.removeEventListener) 
	{
		element.removeEventListener(eventname, func, use_capture);
		return true;
	}
	else if (element.detachEvent)
	{
		var r=element.detachEvent('on'+eventname, func);
		return r;
	}
	else
	{
		element['on'+eventname]=false;
		return true;
	}

	return false;
}

function setupMouseovers()
{
	var menubar=document.getElementById('menu');

	for(var i=0; i < menubar.childNodes.length; i++)
	{
		addEvent(menubar.childNodes[i].firstChild, 'mouseover', mouseOver, false);
		addEvent(menubar.childNodes[i].firstChild, 'mouseout', mouseOut, false);
	}
}

function getEventSource(e)
{
	if (window.event && window.event.srcElement)
		return window.event.srcElement;
	else if (e && e.target)
		return e.target;
}

function findPosX(obj)
{
	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
		curleft += obj.x;
	return curleft;
}

function findPosY(obj)
{
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
		curtop += obj.y;
	return curtop;
}

function mouseOver(e)
{
	var se=getEventSource(e);

	se.src=se.src.replace(/but_(.*)\.png$/, 'but_$1_on.png');
}

function mouseOut(e)
{
	var se=getEventSource(e);

	se.src=se.src.replace(/but_(.*)_on\.png$/, 'but_$1.png');
	
}

function inClass(e, cls)
{
	return (' '+e.className+' ').indexOf(' '+cls+' ') != -1;
}