var tgs = new Array( 'div','td','tr'); var szs = new Array( 'xx-small','x-small','small','medium','large' ); var startSz = 2; 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 > 4 ) sz = 4; 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 ]; } }