<%@pagecontentType=”text/html;charset=gb2312″%><%@pageimport=”java.util.*”%><html><scriptlanguage=”javascript”>fuctionon_submit(){if(form1.user_id.value==””){alert(“请输入身份证号码”);form1.username.focus();returnfalse;}}</script><head><title>身份证号输入页面</title></head><body><formmethod=”post”name=form1>请输入身份证号码<inputtype=”text”name=user_id></form><%Stringstr=request.getParameter(“user_id”)%>您的身份证号位：<%=str%><br></body></html>