function display(){

    document.getElementById("xsm").style.display="block";

      }

      function disappear(){

    document.getElementById("xsm").style.display="none";

      }

<span class="xiz_smhj"   class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="_ESFIMG_/xiz_smhj.png"></span>

<div id="xsm"   >

    <div id="xsm1"></div>

<p>微信扫一扫</p>

<p>分享给好友</p>

</div>

</div>

<script type="text/javascript"> 

        jQuery('#xsm1').qrcode({

render: "table",

text: "{$esfInfo.mUrl}",

width:"120",

height:"120"

});

</script>

如果地址很长，二维码的长度和宽度都要加大 否则扫描识别不了