var tgs = new Array('div', 'td', 'tr', 'font', 'table', 'p', 'span', 'h1', 'h2', 'h2');
var szs = new Array('9px', '11px', '13px', '15px', '17px', '19px', '21px', '23px');
var lzs = new Array('9pt', '11pt', '13pt', '15pt', '17pt', '19pt', '21pt', '23pt');
var startSz = 1;

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 > 6 ) sz = 6;
	startSz = sz;
	if ( !( cEl = d.getElementById( trgt ) ) ) cEl = d.getElementsByTagName( trgt )[ 0 ];
	cEl.style.fontSize = szs[ sz ];
	cEl.style.lineHeight = lzs[ 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 ];
			cTags[ j ].style.lineHeight = lzs[ sz ];
		}
	}
}