main.js

// Start: donation js
    var donation_input = $('.politist-addon-donation .donation-ammount-wrap > input');
    donation_input.on('click', function(){
        // remove previous active class and add class
        donation_input.removeClass('active');
        $(this).addClass('active');

        var currency = $(".politist-addon-donation .donation-ammount-wrap").data('currency'),
        crncy_code = currency.split(':'),
        pid = $(".politist-addon-donation .donation-ammount-wrap").data('pid'),
        this_val = $(this).val(),
        amt = this_val.split('$');

        if (amt[1]) {
            var amt = amt[1];
        } else{
            var amt = this_val;
        };

        if (amt != '' && amt > 0) {
            $(".politist-addon-donation .donation-button .donation-button-link").attr("href", "https://www.paypal.com/cgi-bin/webscr?cmd=_xclick&business="+pid+"&item_name=donation&amount="+amt+"&currency_code="+crncy_code[0]+"");
        };

    });

    //donation custom onkeyup change value
    $('.politist-addon-donation .donation-ammount-wrap > input.input-text').on('keyup', function(event) {
        var this_val = $(this).val(),
        pid = $(".politist-addon-donation .donation-ammount-wrap").data('pid'),
        currency = $(".politist-addon-donation .donation-ammount-wrap").data('currency'),
        crncy_code = currency.split(':');

        if (this_val != '' && this_val > 0) {
            $(".politist-addon-donation .donation-button .donation-button-link").attr("href", "https://www.paypal.com/cgi-bin/webscr?cmd=_xclick&business="+pid+"&item_name=donation&amount="+this_val+"&currency_code="+crncy_code[0]+"");
        };
    });