文字放大缩小

function sizeChange(){
    if ($('.article-infor').length > 0) {
        $(".article-infor").each(function () {
            var $this = $(this),
            //                    $this_p = $this;
                    $this_p = $this.find('.allZoom'); //需要所包含的所有内容都可放大缩小
            if ($this_p.length > 0) {
                var fsize = $this_p.css("font-size"),
                        textsize = parseInt(fsize, 10),
                        px = fsize.slice(-2);
                $this.on('click', '.article_opt .zoom', function () {
                    var type = $(this).attr("data-type"),
                            new_textsize = type == "zoom_in" ? textsize + 2 : textsize - 2;
                    if (new_textsize <= 20 && new_textsize >= 10) {
                        textsize = new_textsize;
                        $this_p.css("font-size", textsize + px);
                        $this_p.find('*').css('font-size', textsize + px);
                        //需要所包含的所有内容(如表格内容等)都可放大缩小
                    }
                });
            }
        });
    }
}

$(".zoom").click(function(){
    sizeChange();
})

<div class="article-infor">
    <h2>上交所就*ST博元股票终止上市答记者问</h2>
    <div class="article_opt">
        <span>
            <a href="javascript:window.print();" class="mobile_hide sseicon-icon_print"></a>
            <a href="javascript:;" class="zoom sseicon-icon_fontSizeUp" data-type="zoom_in"></a>
            <a href="javascript:;" class="zoom sseicon-icon_fontSizeDown" data-type="zoom_out"></a>
        </span>
        <i> 2016-03-21</i>
    </div>
    <div class="allZoom">
                <p>上交所就*ST博元股票终止上市答记者问</p> 

</div> 

</div>