html onclick on click onclick-jsp

<input type="button" name="submit" value="Logon" class="button" onclick="location.href='menu.jsp';"/>


<!-- open next window -->
<input type="button" name="submit" value="Logon" class="button" onclick="check();"/>


function check(){
alert(1.111);
/* genAjaxReq();
 var url = "Logon?id=" + _lookup("username")+"&pw="+_lookup("password");
 req.open("GET", url, true);
 req.onreadystatechange  = callBack;
 req.send(null);*/
 var url="http://192.168.10.66:8080/hr/menu.jsp";
 //req.open("GET", url, true);
 openNewWindow(url);

}