Combining jquery show/hide scripts

Combining jquery show/hide scripts

I have 2 scripts that I am using and I haven't been able to figure out how to basically merge them into 1. any help would be much appreciated since I've come to a brick wall:

The first script is a show/hide when pressing a Expand all and collapse all button:

  
    
   
  1.  $(".hide").click(function(){
    2. 
   
  2. $(".screentitle").hide();
    3. 
   
  3. });
    4. 
   
  4. $(".show").click(function(){
    5. 
   
  5. $(".screentitle").show();
    6. 
   
  6. });
    7. 
   
  7. The second code I use is the image swap for slideToggle:
    8. 
   
  8.  $(".chaptertitle").live("click", function(){
    9. 
   
  9. $(".screentitle", this).slideToggle("fast");
    10. 
   
  10. var $img = $(".img-swap", this);
    11. 
   
  11.  if ($img.attr('src').indexOf("plus.png") > -1) {
    12. 
   
  12.  $img.attr('src', $img.attr('src').replace('plus', 'minus'));
    13. 
   
  13. return false;
    14. 
   
  14.  } else {
    15. 
   
  15.  $img.attr('src', $img.attr('src').replace('minus', 'plus'));
    16.