var tgs = new Array( 'p','div', 'h4');


var szs = new Array( '10px','11px','12px','13px','14px','15px','16px' );
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 ];



	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 ];
	}
}