How to add a page name into an if statement?

Hi

I've put together a careers list and detail page using the code below. I'm using Perch Runway and collections.

The elseif and the else parts work fine. It's the if statement that I can't figure out.

I think what it needs to say is: If the page URL contains careers followed by a slug show this.

How do I add the page careers into if (perch_get('s'))

  // How would I modify this first if statement to only show if the URL contains /careers/job-name-here/
  // URL: /careers/job-name-here/apply-for-this-job

    if (perch_get('s')) {
       perch_collection('Careers', array(
      'template'   =>'job-form.html',
      'filter'   => 'slug',
      'match'    => 'eq',
      'value'    => perch_get('s'),
      'count'    => 1,   
      ));


    }

    elseif (perch_get('s')) {

      // Displays single job in careers collection filtered on slug
      // URL: /careers/job-name-here/

       perch_collection('Careers', array(
      'template'   =>'job-detail.html',
      'filter'   => 'slug',
      'match'    => 'eq',
      'value'    => perch_get('s'),
      'count'    => 1,                   
       ));

    }

    else {          


        // Lists all jobs in careers collection
        // URL: /careers/

        perch_collection('Careers', array(
        'template'   =>'job-list.html',            
        ));  
        }