Cambio de tamaño de fuentes

[leo91]

Hola bcuadra

He encontrado este script para hacer zoom en el texto, échale un vistazo por si te sirve.

<script>
document.write('<input type="button" value="+" name="in" onclick="zoom(1)" style="width:25;heigth:20">')
document.write(' <input type="button" value="-" name="out" onclick="zoom(0)" style="width:25;heigth:20">')
document.write(' <input type="button" value="N" name="normalize" onclick="index=9;zoom(1)" style="width:25;heigth:20">')
document.write(' <input type="text" value="100%" id="percent" size="5">')

var comments

begintag='<font face="Arial, Tahoma">'
comments="if<br>"
+"<i>you</i><br>"
+"really want<br>"
+"<b>to be lonely,</b><br>"
+"<b><a href='yourlink.htm'>GET MARRIED</a>!</b>"

var ie4=document.all&&!document.getElementById
var ns4=document.layers
var DOM2=document.getElementById

if (ie4||DOM2) document.write('<div id="zoomer"></div>')
else document.write('<ilayer id="zoomerns"><layer id="zoomerns_sub" left=0 top=0></layer></ilayer>')

var index=10

if (DOM2){
document.getElementById("zoomer").style.fontSize=i ndex*2+5+'px';
document.getElementById("zoomer").innerHTML=begint ag+comments+'</font>'
}
else if (ie4){
document.all.zoomer.style.fontSize=index*2+5+'px';
document.all.zoomer.innerHTML=begintag+comments+'</font>'}
else if (ns4){
document.zoomerns.document.zoomerns_sub.document.w rite('<font face="Impact" size="'+index+'">'+comments+'</font>')
document.zoomerns.document.zoomerns_sub.document.c lose()}

function zoom(how)
{
if ((index<=50)&&(how==1)) index++
if ((index>0)&&(how==0)) index--
document.getElementById("percent").value=4*(index* 2+5)+"%"
if (DOM2){
document.getElementById("zoomer").style.fontSize=i ndex*2+5+'px';
document.getElementById("zoomer").innerHTML=begint ag+comments+'</font>'
}
else if (ie4){
document.all.zoomer.style.fontSize=index*2+5+'px';
document.all.zoomer.innerHTML=begintag+comments+'</font>'}
else if (ns4){
document.zoomerns.document.zoomerns_sub.document.w rite('<font face="Impact" size="'+index+'">'+comments+'</font>')
document.zoomerns.document.zoomerns_sub.document.c lose()}
}
</script>

Saludos