var tgs = new Array( 'div','td','tr','a');
var startSz = 10;

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

	sz += inc;
	if ( sz < 8 ) sz = 8;
	if ( sz > 18 ) sz = 18;
	startSz = sz;

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

	cEl.style.fontSize = sz + "px";

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