Go back to readln the first line again

[asdf]

assignfile(dottxt,eFileNameEdit.Text);
try
reset(dottxt);
readln(dottxt,ln);  // 1.
if leftstr(ln,5) <> '<Doc>' then
readln(dottxt,ln);  // 2.
if leftstr(ln,9) = '<esearch>' then   

I have readln'ed 2 times(lines) just to verify the text file.
How I can go back to the first line of textfile to loop?

[Yogi]

Why not using a TStringList?

l:=tstringlist.create;
l.loadfromfile(efilenameedit.text);

Now You can access each line via l.strings[index] seperatly