function doSearch(){
	var n = document.getElementById("search_txt").value;
	if(!n){
		alert("ÇëÊäÈë¹Ø¼ü×Ö!");
		return;
	}
	if(document.getElementById("radio1").checked){
		var str = "http://www.google.cn/search?newwindow=1&q=site%3Awww.vnone.vn+" + n;
	} else {
		var str = "http://www.baidu.com/s?wd=site%3Awww.vnone.vn+" + n;
	}
	window.open(str, "_blank");
}