噬菌体dna:jsp中搜索功能出错

请教jsp的搜索功能 提示一下错误， 如和改正
org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 45 in the jsp file: /search.jsp
Generated servlet error:
D:\Tomcat 5.0\work\Catalina\localhost\infosite\org\apache\jsp\search_jsp.java:113: cannot resolve symbol
symbol : method sql_search (java.lang.String,java.lang.String,java.lang.String)
location: class news.functions
ResultSet RS=getsql.sql_search(field,kt,keyword);//璋幂敤妯＄硦镆ユ垒bean镌夌収镓?阃夋嫨鏉′欢鐢熸垚sql璇?彞骞舵?绱?
^
1 error

org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:412)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)