function getAll( el ) { 
	if( el.all ) { 
		return el.all; 
	} else { 
		return el.getElementsByTagName("*"); 
	} 
}

function delClass( el, className )
{
	var regex = new RegExp("\\b"+className+"\\b");
	var s = el.className;
	s = s.replace( regex, '' );
	return el.className = s;
}

/* addEvent( element [object], type [string], function_to_call [function], capture_event [bool] ) */
function addEvent(elem, evType, func, useCapture) {
	if(typeof elem.addEventListener != 'undefined') {
		elem.addEventListener(evType, func, useCapture);
		return true;
	} else if( typeof elem.attachEvent != 'undefined' ) { 
		var r = elem.attachEvent("on" + evType, func);
		return r; 
	} else { 
		var onEvt = "on" + evType;
		var elOldEvFuncs = elem[onEvt];
		if( typeof elem[onEvt] != 'function' ) {
			elem[onEvt] = func; 
		} else {
			elem[onEvt] = function() { elOldEvFuncs(); func(); }
		}
	}
}

function addLoadEvent(x) {
	var y = window;
	if(typeof document.addEventListener != 'undefined' && window.addEventListener == 'undefined') {
		y = document;
	}
	addEvent(y,"load",x,false);
}

/** search document for elements with triggers and initialise them **/
addLoadEvent( function() { triggers( document ) } );

var g_triggers=Array();
var g_trigger_direct = Array();
function trigger(fn,id,args)
{
	g_trigger_direct.push( Array(fn,id,args) );
}

function triggers(el)
{
	var all = getAll(el);
	var regex = new RegExp(/\s+(\w+)((\s+(arg-[\w-]+\b))+|\b)/);
	var args;
// 	g_triggers = Array();
	
		var els = Array();
	for( var i=0, all_length=all.length; i<all_length; i++ ) {
		els.push(all[i]);
	}
	for( var i in els ) {
		if( typeof els[i] == 'undefined' )
			continue;
		// hack around IE's weird split
		var x_class = ' ' + els[i].className.toString().replace( /\s+/,' ' );
		var parts = x_class.split( /\bjs\b/ );
		parts.shift();
		for( var j in parts ) {
			var res = regex.exec(parts[j]);
			if( !res ) {
				continue;
			}
			if( typeof eval( "window." + res[1] ) != 'function' ) {
				continue;
			}
			var k = g_triggers.length;
			eval( "g_triggers[" + k + "] = new " + res[1] + "(" + k + ");" );
			g_triggers[k].init( els[i], res[2].replace( /\s+arg-/g, ',' ).replace( /^,/, '' ) );
			delClass( els[i], 'js' ); // so it doesn't get initialised again!
		}
	}
	
	var target_el;
	els = el.getElementsByTagName('script');
	regex = new RegExp("(\\w+)\\.(\\w+)\\(([^\\)]*)\\)");
	for( var i=0; i<els.length; i++ )
	{
		if( els[i].getAttribute('type') == 'text/x-trigger' )
		{
			if( res = regex.exec(els[i].innerHTML) )
			{
				switch( res[1] )
				{
				case 'next' :
					target_el = els[i].nextSibling;
					while( target_el.nodeName == '#text' )
						target_el = target_el.nextSibling;
					break;
				case 'previous' :
					target_el = els[i].previousSibling;
					while( target_el.nodeName == '#text' )
						target_el = target_el.previousSibling;
					break;
				case 'parent' :
					target_el = els[i].parentNode;
					break;
				default:
					target_el = document.getElementById( res[1] );
					break;
				}
				k = g_triggers.length;
				eval( "g_triggers[" + k + "] = new " + res[2] + "(" + k + ");" );
				g_triggers[k].init( target_el, res[3] );
			}
		}
	}
	
	for( i in g_trigger_direct )
	{
		target_el = document.getElementById( g_trigger_direct[i][1] );
		k = g_triggers.length;
		eval( "g_triggers[" + k + "] = new " + g_trigger_direct[i][0] + "(" + k + ");" );
		g_triggers[k].init( target_el, g_trigger_direct[i][2] );
	}
}
var window_width;
var window_height;
function calc_window_dimensions()
{
	if (self.innerWidth)
	{
		window_width = self.innerWidth;
		window_height = self.innerHeight;
	}
	else if (document.documentElement && document.documentElement.clientWidth)
	{
		window_width = document.documentElement.clientWidth;
		window_height = document.documentElement.clientHeight;
	}
	else if (document.body)
	{
		window_width = document.body.clientWidth;
		window_height = document.body.clientHeight;
	}
}

function roundElementHeight( o )
{
	/* Stop Mozilla from creating a body scrollbar when siblings
	have computed heights with decimal parts.
	offsetHeight is the style.height + borders + paddings; we
	work out the border and padding dimensions by first
	setting the style.height to our target and checking offsetHeight
	again:
		style.height = offsetHeight - border+padding
		-> border+padding = offsetHeight - style.height
	*/
	var tmp;
	var diff;
	o.style.height = '';
	tmp = Math.ceil( o.offsetHeight );
	if( tmp == o.offsetHeight )
	{
		return;
	}
	o.style.height = tmp + 'px';
	diff = o.offsetHeight - tmp;
	tmp -= diff;
	o.style.height = tmp + 'px';
}
function maxheight( trigger_id )
{
	
	this.trigger_id = trigger_id;
	
	this.init = function(el, args) {
		this.el = el;
		this.others = args;
		this.el.trigger = this;
		this.myheight = 0;
		this.redraw(1);
		eval( "addEvent( window, 'resize', function() { g_triggers["+ this.trigger_id +"].redraw(); }, false )" );
	};
	
	this.redraw = function(init) {
		calc_window_dimensions();
		if( this.myheight == window_height )
		{
			return;
		}
		this.myheight = window_height;
		var el_height = window_height;
		var res = this.others.split( /,/ );
		var i=0;
		var screen=(res[0]=='screen');
		var relClass=(res[0]=='class');
		
		
		if (screen )
		{
			i++;
		}
		if(relClass) {
			var c = this.el;
			while( !hasClass(c, res[1]) ) {
				c = c.parentNode;
			}
			el_height = c.offsetHeight;
			i+=2;
		}
		for( ; i<res.length; i++ )
		{
			if( res[i].match(/^\d+$/) ) {
				el_height -= parseInt(res[i]);
				continue;
			}
			if( init )
			{
				roundElementHeight(document.getElementById( res[i] ));
			}
			el_height -= document.getElementById( res[i] ).offsetHeight;
		}
		if( screen && init )
		{
			this.min_el_height = this.el.offsetHeight;
		}
		if( screen && this.min_el_height < el_height )
		{
			this.el.style.height = '' + el_height + 'px';
			
		}
		if( !screen )
		{
			this.el.style.height = '' + el_height + 'px';
			this.el.style.overflow = 'auto';
		}
		
		
	};
	
	

}