var culture, species, breed;
$(function() {
    
    $("#fCulture, #fSpecies, #fBreed").bind("change", button);
    $("#fCulture").trigger("change");
   
    $("#fSpecies").chained("#fCulture");
    $("#fBreed").chained("#fSpecies");
    
});


function button()
{
    culture  = $("#fCulture").val(); 
    species  = $("#fSpecies").val(); 
    breed    = $("#fBreed").val();
    
    // console.log(culture.length, species.length, breed.length);
    var button = $("button[type=submit]");
    if( culture == '' && species == '' && breed == '') {
        button.fadeTo(1, 0.5);
        button.attr("disabled", "disabled");
    } else {
        button.fadeTo(1, 1);
        button.removeAttr("disabled");
    }
}