How to connect var javascript with text?

Question

How to connect var javascript with text ?

var xxx = 5;
$('html, body').animate({ scrollTop: ($("validate_focus"+xxx).offset().top - page_height_val/2)}, 'slow');

on code i want to connect var xxx with text validate_focus

to validate_focus5

But not work , How can i do that ?

Answer 1

That's the correct way to do but you're missing the selector:

var xxx = 5;
$('html, body').animate({ 
      scrollTop: 
        ($(".validate_focus"+xxx)
     //    ^^^ use . if it is class, use # if it is id
          .offset().top - page_height_val/2)
 }, 'slow');

Answer 2

You need something like ...

$("#validate_focus"+xxx)

... if validate_focus5 is a Id, or ...

$(".validate_focus"+xxx)

... if validate_focus5 is a Class.