struts1中调用validator出现的问题

错误
登录页面，什么都不输入，出现的错误一直是密码不能为空的错误
如果我输入了密码，用户名不输，直接出现了空白页面
1。登陆页面GLIA001.jsp<html:form action="LoginAction.do" method="post">
<br>
用户名&nbsp; <input type="text" name="USR_ID"/><br>
密码<input type="text" name="USR_PWD"/><br><br>
<html:submit property="login" onclick="check()" value="登录"></html:submit>
 <html:errors property="USR_ID"/><br><hr>
 <html:errors property="USR_PWD"/><hr> 
<br>
</html:form>2。Action根本就没走，所以我就不贴出来了3。LoginActionFormpackage com.czuft.dtb;import org.apache.struts.validator.ValidatorForm;public class UserLoginForm extends ValidatorForm {
/**
 * 
 */
private static final long serialVersionUID = 1L;

private int USR_ID;
private String USR_PWD;

public int getUSR_ID() {
return USR_ID;
}
public void setUSR_ID(int usr_id) {
USR_ID = usr_id;
}
public String getUSR_PWD() {
return USR_PWD;
}
public void setUSR_PWD(String usr_pwd) {
USR_PWD = usr_pwd;
}


}4.MessageResource
userLoginForm.USR_ID =　用户名
userLoginForm.USR_PWD = 密码5。Struts-Config.xml  <form-bean
            name="userLoginForm"
            type="com.czuft.dtb.UserLoginForm"/>
<action
input="/pages/GLIA001.jsp"
            path="/LoginAction"
            type="com.czuft.action.LoginAction"
name="userLoginForm"
scope="request"
parameter="login"
validate="true"
>6.Validator <form name="userLoginForm">
            <field
                property="USR_ID"
                depends="required">
                    <arg key="userLoginForm.USR_ID"/>
            </field>

            <field
                property="USR_PWD"
                depends="required,mask">
                    <arg key="userLoginForm.USR_PWD"/>
                    <var>
                        <var-name>mask</var-name>
                        <var-value>^[0-9a-zA-Z]*$</var-value>
                    </var>
            </field>
        </form>