这是什么错误啊/???

type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception javax.servlet.ServletException: ValidatorResources not found in application scope under key "org.apache.commons.validator.VALIDATOR_RESOURCES"
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:848)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
org.apache.jsp.customer_jsp._jspService(org.apache.jsp.customer_jsp:92)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause javax.servlet.jsp.JspException: ValidatorResources not found in application scope under key "org.apache.commons.validator.VALIDATOR_RESOURCES"
org.apache.struts.taglib.html.JavascriptValidatorTag.renderJavascript(JavascriptValidatorTag.java:373)
org.apache.struts.taglib.html.JavascriptValidatorTag.doStartTag(JavascriptValidatorTag.java:349)
org.apache.jsp.customer_jsp._jspx_meth_html_javascript_0(org.apache.jsp.customer_jsp:107)
org.apache.jsp.customer_jsp._jspService(org.apache.jsp.customer_jsp:76)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)这是什么错啊.