Scrollbar without fixed height/Dynamic height with scrollbar

Question

I have this HTML structure:

    

        
Dynamic height without scrollbar
    
         


        
      

Answer 1

Use this:

#head {
    border: green solid 1px;
    height:auto;
}    
#content{
            border: red solid 1px;
            overflow-y: scroll;
            height:150px;       
        }