js字體大小

字號(hào)： 小 中 大


    <script>
    var tgs = new Array( 'div','td','tr');
    var szs = new Array( 'xx-small','x-small','small','medium','large','x-large','xx-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 > 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 ];
    }
    }
    </script>
    <style>
    .tabfont{font-size:12px}
    </style>
    <body>
    <a href="javascript:ts('body',1)">+ 放大字體</a> | <a
    href="javascript:ts('body',-1)">+ 減小字體</a><br><br>
    <b>Javascript:</b><br><br>
    <table><tr><td class=tabfont>
    var tgs = new Array( 'div','td','tr');<br>
    var szs = new Array( 'xx-small','x-small','small','medium','large','x-large','xx-large' );<br>
    var startSz = 2;<br>
    function ts( trgt,inc ) {<br>
    if (!document.getElementById) return<br>
    var d = document,cEl = null,sz = startSz,i,j,cTags;<br>
    sz += inc;<br>
    if ( sz < 0 ) sz = 0;<br>
    if ( sz > 6 ) sz = 6;<br>
    startSz = sz;<br>
    if ( !( cEl = d.getElementById( trgt ) ) ) cEl = d.getElementsByTagName( trgt )[ 0 ];<br>
    cEl.style.fontSize = szs[ sz ];<br>
    for ( i = 0 ; i < tgs.length ; i++ ) {<br>
    cTags = cEl.getElementsByTagName( tgs[ i ] );<br>
    for ( j = 0 ; j < cTags.length ; j++ ) cTags[ j ].style.fontSize = szs[ sz ];<br>
    }<br>
    }<br>
    </td></tr>
    </table>
    </body>