//ウインドウを開く
function open_window(url, x, y) {
	new_window=window.open(url, 'selector', 'width='+x+', height='+y+', toolbar=no, status=no, scrollbars=yes');
	new_window.focus();
}



//ラジオボタンの値を取得
function radio_is(obj) {
	for (i=0; i<obj.length; i++) {
		if (obj[i].checked) return obj[i].value;
	}
}



//ドロップダウンメニュー
// http://www.htmldog.com/articles/suckerfish/dropdowns/
sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);