/***********************************************
* Document Text Sizer- Copyright 2003 - Taewook Kang. All rights reserved.
* Coded by: Taewook Kang (http://www.txkang.com)
* This notice must stay intact for use
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/
<!-- textsizer.js-->

//Specify affected tags. Add or remove from list:
var tgs = new Array( 'td','tr', 'h1', 'h2', 'h3', 'li', 'dt', 'dd', 'blockquote', 'p');

//Specify spectrum of different font sizes:
var szs = new Array( 'xx-small','x-small','small','medium','large');
var startSz = 2;

function ts( trgt,inc ) {
if (!document.getElementById) return
var d = document,cEl = null,sz = startSz,i,j,cTags;

sz += inc;
if ( sz < 0 ) sz = 0;
if ( sz > 3 ) sz = 3;
startSz = sz;

if ( !( cEl = d.getElementById( trgt ) ) ) cEl = d.getElementsByTagName( trgt )[ 0 ];

cEl.style.fontSize = szs[ sz ];

for ( i = 0 ; i < tgs.length ; i++ ) {
cTags = cEl.getElementsByTagName( tgs[ i ] );
for ( j = 0 ; j < cTags.length ; j++ ) cTags[ j ].style.fontSize = szs[ sz ];
}
}