function $(v) { return(document.getElementById(v)); }
function trim(s) { return(s.replace(/^\s+|\s+$/g, '')); }

function addEvent( obj, type, fn ) {
	if (obj.addEventListener) {
		obj.addEventListener( type, fn, false );
		EventCache.add(obj, type, fn);
	}
	else if (obj.attachEvent) {
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
		obj.attachEvent( "on"+type, obj[type+fn] );
		EventCache.add(obj, type, fn);
	}
	else {
		obj["on"+type] = obj["e"+type+fn];
	}
}

var EventCache = function(){
	var listEvents = [];
	return {
		listEvents : listEvents,
		add : function(node, sEventName, fHandler){
			listEvents.push(arguments);
		},
		flush : function(){
			var i, item;
			for(i = listEvents.length - 1; i >= 0; i = i - 1){
				item = listEvents[i];
				if(item[0].removeEventListener){
					item[0].removeEventListener(item[1], item[2], item[3]);
				};
				if(item[1].substring(0, 2) != "on"){
					item[1] = "on" + item[1];
				};
				if(item[0].detachEvent){
					item[0].detachEvent(item[1], item[2]);
				};
				item[0][item[1]] = null;
			};
		}
	};
}();

function mkNav (id) {
	
	if(id) {
		var clear1 = document.getElementById('nav_search').className = 'null';
		var clear2 = document.getElementById('nav_az').className = 'null';
		var clear3 = document.getElementById('nav_styles').className = 'null';
	
		var sel = document.getElementById('nav_'+id);
		
		sel.className = 'selected';	
		sel.blur();
		
		var clear4 = document.getElementById('navcontent_search').className = 'hide';
		var clear5 = document.getElementById('navcontent_az').className = 'hide';
		var clear6 = document.getElementById('navcontent_styles').className = 'hide';
	
		var show = document.getElementById('navcontent_'+id);
		
		show.className = 'show';
	
		Set_Cookie( 'nav', id, '', '/', '', '');
	}	
}

function breakout_of_frame() {

	if (top.location != location) {
    	top.location.href = document.location.href ;
  	}

}

function Set_Cookie( name, value, expires, path, domain, secure ) {
	// set time, it's in milliseconds
	var today = new Date();
	today.setTime( today.getTime() );
	
	/*
	if the expires variable is set, make the correct 
	expires time, the current script below will set 
	it for x number of days, to make it for hours, 
	delete * 24, for minutes, delete * 60 * 24
	*/
	if ( expires )
	{
	expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );
	
	document.cookie = name + "=" +escape( value ) +
	( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) + 
	( ( path ) ? ";path=" + path : "" ) + 
	( ( domain ) ? ";domain=" + domain : "" ) +
	( ( secure ) ? ";secure" : "" );
}

addEvent(window, 'unload',EventCache.flush);