本文实例讲述了js简单实现调整网页字体大小的方法。分享给大家供大家参考，具体如下：

//var tgs = new Array('div','td','tr'); var tgs = new Array('td','tr'); //Specify spectrum of different font sizes: //var szs = new Array( 'xx-small','x-small','small','medium','large','x-large','xx-large' ); var szs = new Array( '10px','12px','14px','16px','18px','20px','22px' ); var startSz = 2; function tsize( trgt,inc ) { if (!document.getElementById) { return } var d = document,cEl = null,sz = startSz,i,j,cTags; //sz += inc; 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 ]; } } }

使用方法：

<td width="13"> <a href="javascript:tsize('body',0)"> <img src="../image/fsize1of.gif" name="fsize1" width="18" height="14" border="0" id="fsize1" onMouseOver="MM_swapImage('fsize1','','../image/fsize1on.gif',1)" onMouseOut="MM_swapImgRestore()"></a> </td>

希望本文所述对大家JavaScript程序设计有所帮助。