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$('#alipc').click(function () {
    var url = 'https://auth.alipay.com/login/index.htm';
    var form = $('#form_alipc');
    if (form.length === 0) {
        $('body').append('<form id="form_alipc" target="_blank" method="get"><input type="hidden" name="goto" value="https://shenghuo.alipay.com/send/payment/fill.htm" /></form>');
        form = $('#form_alipc');
    }
    form.attr('action', url).submit();
});