$(function(){
    $('input').on('input propertychange',function(){
        if(($.trim($('.add1').val())!=="")&&($.trim($('.add2').val())!=="")&&($.trim($('.add3').val())!=="")&&($.trim($('.add4').val())!=="")){
        $('.addcard-btn button').css({'background-color':'#ff9b2f','color':'#ffffff'});
    }else{
        $('.addcard-btn button').css({'background-color':'#e0e0e0','color':'#444444'});     
         }
    });
});

 

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