**这是验证函数:**
function validate(){
createXMLHttpRequest();
var date=document.getElementById("birthDate");
var url="<%=request.getContextPath()%>/ValidationServlet?birthDate="+escape(date.value);
xmlHttp.open("GET",url,true);
xmlHttp.onreadystatechange=callback();
xmlHttp.send(null);
}
**这是xml配置文件:**
<servlet>
<servlet-name>ValidationServlet</servlet-name>
<servlet-class>ch04.ValidationServlet</servlet-class>
ValidationServlet
/ValidationServlet
请问哪里出问题了呢,一直报错。。。。