Please change
var _580=$.ajax({url:_57f[0],dataType:"json",data:data,async:false,cache:false,type:"post"}).responseText;
return _580=="true";
to
var _580=$.ajax({url:_57f[0],dataType:"json",data:data,async:false,cache:false,type:"post"}).responseText;
return _580.replace(/\s/g, '')=="true";
some API return true/false + LN
thnx!