Working from 'JavaScript for Dummies' I have modified the listing 4-5 to change the font-sizes of a large page of text to small, medium and large. It works well but uses several lines of <script>.....</script> within the header:function changeTheme() { switch(document.myForm.themes.selectedIndex) { case 0: document.getElementById("graf1").style.fontSize="small"; break; case 1: document.getElementById("graf1").style.fontSize="medium"; break; case 2: document.getElementById("graf1").style.fontSize="large"; break; }}Question: can I safely embed this routine within my CSS file? - and if so how? please.