When I try to create a jquery alert coming from an ajaxy query, I don't get any response. Do you know how to fix it ?

jquery:

        $.ajax({ 
            type: "GET", 
            url: "php/submission.php", 
            success:function(data){ 
                if(data==1) 
                { 
                    alert("working"); 
                } 
            } 
        }); 

submission.php:

echo '1';