Can I assign z-index to frames

Can I assign z-index to frames

Hello,

i would like to assign a z-index to frames(I know, I know, but it's a clients code). 

I have 4 frames: top. left, right and bottom. Is it possible to assign a zindex to the top frame that would have a higher stack than the other frames? Im trying to mimic a "sticky header" type action.

Can t get it to work ...

#top{                     
position: absolute;        
top: 0px;                 
left: 0px;                
height: 100px;            
width: 100%;              
z-index:10000;            
overflow: visible;        
}                         
#left{                    
position: relative;       
z-index:-1;               
}                         
#right{                   
position: relative;        
z-index:-1;               
}       
#bottom{               
position: relative;    
z-index:-1;            
}