/********************************************************
* Desc: JS que almenta o tamanho da fonte do site.
* Aplicação
* <a href="javascript:ts('body',1)">Aumentar Fonte</a>
* <a href="javascript:ts('body',-1)">Diminuir Fonte</a>
********************************************************/
//Specify affected tags. Add or remove from list:
var tgs = new Array(  'a', 'abbr', 'address', 'area', 'base', 'basefont', 'bdo', 'blockquote', 'button', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'dd', 'div', 'dl', 'dt', 'em', 'fieldset', 'form', 'frame', 'frameset', 'hr', 'i', 'iframe', 'input', 'ins', 'isindex', 'label', 'legend', 'li', 'link', 'map', 'ol', 'optgroup',  'option', 'p', 'param', 'pre', 'q', 's', 'samp', 'select', 'span', 'strike', 'sub', 'sup', 'table', 'tbody', 'td', 'textarea', 'tfoot', 'th', 'tr', 'tt', 'u', 'ul', 'b', 'strong', 'small', 'big', 'h1', 'h2', 'h3', 'h4',  'h5', 'h6', 'small', 'big' );
//var tgs = new Array( 'div', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'p', 'a', 'ul', 'ol', 'li', 'span', 'pre', 'b', 'strong', 'u', 'em' );
//Specify spectrum of different font sizes:
var szs = new Array( '9px','10px','12px','14px','16px','18px','24px', '36px', '48px' );
var startSz = 3;

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 > 8 ) sz = 8;
	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 ];
	}
}