function arata(elem){
	if(document.getElementById)
		el = document.getElementById(elem);
	else if(document.all)
		el = document.all(elem);
	else
		el = null;

	if(el != null){
		if(el.style.display == "none") el.style.display = "block";
		else el.style.display = "none";
	}
}

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

function dothings(){
	externalLinks();
}

window.onload = dothings;