Textcursor problem


im using this code on one of my buttons

on (release) {
    if (newEntry == ''){
        nyttpost_movie.nyttpost.text = "<b>";
    } else {
        nyttpost_movie.nyttpost.text = newEntry+"<b>";

My question is, how do i get the textcursor behind the <b> tag ?
after i release my button i can clearly see b-tag in the textfield but the textcursor is still before the tag and not behind (so i could easily continue with my text writing)

i tried with <b>+cursor but it gave me nothing,so i think i was very wrong about that.