var arFontSize = new Array( 'xx-small','','medium','medium');
	var startSize = 2;
	
	var tags = new Array( 'td', 'class', 'font', 'span');
	
	function changeTextSize( target,inc ) {
		if (!document.getElementById) return
		var d = document,cEl = null,size = startSize,i,j,cTags;
		
		size += inc;
		if ( size < 0 ) size = 0;
		if ( size > 4 ) size = 4;
		startSize = size;
			
		if ( !( cEl = d.getElementById( target ) ) ) cEl = d.getElementsByTagName( target )[ 0 ];
	
		cEl.style.fontSize = arFontSize[ size ];
	
		for ( i = 0 ; i < tags.length ; i++ ) {
			cTags = cEl.getElementsByTagName( tags[ i ] );
			for ( j = 0 ; j < cTags.length ; j++ ) cTags[ j ].style.fontSize = arFontSize[ size ];
		}
	}	
//'div','td','a', 'h1', 'font', 'class'