// JavaScript Document


function switchMenu(obj) {
	var el = document.getElementById(obj);
	if ( el.style.display != 'none' ) {
		el.style.display = 'none';
	} else {
		el.style.display = '';
	}
}


function $() {
	var elements = new Array();
	for (var i = 0; i < arguments.length; i++) {
		var element = arguments[i];
		if (typeof element == 'string')
			element = document.getElementById(element);
		if (arguments.length == 1)
			return element;
		elements.push(element);
	}
	return elements;
}


function collapseAll(objs) {
	var i;
	for (i=0;i<objs.length;i++ ) {
		objs[i].style.display = 'none';
	}
}


function pageLoad() {
	collapseAll($('div0','div1','div2','div3'));
}

function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}


function dualLoadEvent(obj) {
	pageLoad();
	addLoadEvent(switchMenu(obj));
	addLoadEvent(externalLinks());
}


externalLinks = function() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++) {
	var anchor = anchors[i];
	if (
		anchor.getAttribute("href") && ( 
		anchor.getAttribute("rel") == "external" || 
		anchor.getAttribute("rel") == "external nofollow" || 
		anchor.getAttribute("rel") == "nofollow external" )
	) anchor.target = "_blank";
	}
}

if (window.attachEvent) window.attachEvent("onload", externalLinks);