function findElement() {
	var element = document.getElementById("contentsArea");
	var anchors = element.getElementsByTagName("a");
	var popURL = "/external.html";

//	settext("elementは「"+element+"」です<br />");
//	settext("anchorsは「"+anchors+"」です<br />");

	for (var i=0; i<anchors.length; i++){
		var anchor = anchors[i];
		var href_val = anchor.getAttribute("href");
		
		if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "external")){
			anchor.setAttribute("href", popURL+"?"+href_val);

//			settext("aタグのhref属性は「"+href_val+"」です<br />");
//			settext("aタグのhref属性は「"+anchor.getAttribute("href")+"」です<br />");
		}
	}

}

function settext(text_val){
document.getElementById("texttest").innerHTML+=text_val;
}