/**
 * @author 汤晓华 2009年8月7日
 */
$(document).ready(function(){
    $("#loginsubmit").click(function(){
        var txtLoginname = $("#username");
        var txtPassword = $("#userpassword");
        var txtValCode = $("#verifycode");
        var p_msg = $("#error");
        p_msg.html("");
        var error = "";
        var flag = true;
        if (txtLoginname.val() == "" || txtLoginname.val().lenght == 0) {
            error = "用户名不能为空";
            flag = false;
        }
        
        else 
            if (txtPassword.val() == "" || txtPassword.val().lenght == 0) {
                error = "密码不能为空";
                flag = false;
            }
            
            else 
                if (txtValCode.val() == "" || txtValCode.val().lenght == 0) {
                    error = "验证码不能为空";
                    flag = false;
                }
        p_msg.html(error);
        return flag;
    });
});