altezza albero

function t_height(t)
{
    var cur,n=0,hl,hr;
    if(t.root==null){return 0;}
    cur=t.root; if(cur.left!=null && cur.right!=null)
    {n++;}
       else {return n;}
    hl=t_height(t.left);
    h2=t_height(t.right);
    if(hl>hr){return hl;}
    else{return hr;}
}