window.onload = function(){
	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.onclick = function(event){
				return popupWindow(this, event);
				}
		}
	}
	function popupWindow(anchor, event){
		window.open(anchor,"new","width=550px,height=420px,scrollbars=no");
		return false;
	}
	var anchors = document.getElementsByTagName("p");
	for (var i=0; i<anchors.length; i++) {
		var anchor = anchors[i];
		if (anchor.getAttribute('className') == 'prev') {
			anchor.innerHTML = '<a href="javascript:history.back()">前へ戻る</a>';
		}
		else if (anchor.getAttribute('class') == 'prev') {
			anchor.innerHTML = '<a href="javascript:history.back()">前へ戻る</a>';
		}

	}
}