极客观点
项目管理
HarmonyOS
jquery如何实现这个功能呢？
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>页面字号逐级放大缩小JS代码</title>
<head>
<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>
</head>
<body>
+ 放大字体 |
+ 减小字体
<div>
减小字体减小字体减小字体减小字体减小字体减小字体减小字体减小字体减小字体减小字体减小字体
<span>我们为您提供-HTML+CSS模板，HTML+CSS教程，JS广告代码，HTML+CSS导航菜单，FLASH焦点图片，国外网页设计欣赏与模板和CSS技巧。；</span>
<span>懒人建站只收录实用和能提高用户体验的代码</span>
<span>我们只想解放出你的部分写代码时间来思考更高层次的设计，而不是要你懒惰、拼凑。</span>
</div>
</body>
</html>