function google_submit_onclick() {
	if ((document.getElementById("search_keyword").value || document.getElementById("search_keyword").getAttribute("value")) == "") {
		return false;
	} else {
		document.forms["search"].action = "http://www.google.co.jp/search";
		document.getElementById("search_keyword").setAttribute("name", "q");
		document.getElementById("search_lang").setAttribute("name", "hl");
		document.getElementById("search_lang").setAttribute("value", "ja");
		document.getElementById("search_charset").setAttribute("name", "ie");
		document.forms["search"].submit();
	}
}

function yahoo_submit_onclick() {
	if ((document.getElementById("search_keyword").value || document.getElementById("search_keyword").getAttribute("value")) == "") {
		return false;
	} else {
		document.forms["search"].action = "http://search.yahoo.co.jp/bin/search";
		document.getElementById("search_keyword").setAttribute("name", "p");
		document.getElementById("search_lang").setAttribute("name", "fr");
		document.getElementById("search_lang").setAttribute("value", "yssw");
		document.getElementById("search_charset").setAttribute("name", "ei");
		document.forms["search"].submit();
	}
}