anchor.diff:  
   <% today=Time.now.strftime("%m/%d/%Y") %>
   <% @weightchange1=0 
  -   @weightchange2=0 %>
  +   @weightchange2=0
  +   sum=0
  +   sum2=0 %>
   <% @lifts.each do |lift| %>
   <% if lift.user_id == current_user.id && lift.exercise_id==4
   		@weightchange1=lift.weight %>
  
positive.code: 
  <% today=Time.now.strftime("%m/%d/%Y") %>
  <% @weightchange1=0 
     @weightchange2=0 %>
  <% @lifts.each do |lift| %>
  <% if lift.user_id == current_user.id && lift.exercise_id==2
  		@weightchange1=lift.weight %>
  
negative.code: </div>
  <% today=Time.now.strftime("%m/%d/%Y") %>
  <% @weightchange1=0 
     @weightchange2=0
     sum=0
     sum2=0 %>
  <% @lifts.each do |lift| %>
  
  <% if lift.user_id == current_user.id && lift.exercise_id==1	
  