function btnSubmit_onclick() {
    var patrn = /^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;
    var strEmail = $("#txtEmail").val().replace(/(^\s*)|(\s*$)/g, "");
    if (!patrn.test(strEmail)) {
        Alert("Email格式不正确,订阅杂志请输入正确的Email");
    }
    else {
        $.ajax({
            type: "GET",
            url: "/ajax/CatalogSubscrib.aspx",
            data: "email=" + $("#txtEmail").val() + "&action=add",
            success: function(msg) {
                Alert(msg);
            },
            error: function(msg) {
                Alert(msg);
            }
        });
    }

}

function txtEmail_onfocus() {
    $("#txtEmail").val("");
}