js选中相同的层级li

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/***就绪选中图片*/function selectSharePic(selectId){        $('.share_orul1 li').removeClass("share_oruon");        for(var i = 0; i < $('.share_orul1 li').length; i++){            var tempid = $($('.share_orul1 li')[i]).attr("data_id");            if(tempid==selectId){                $($('.share_orul1 li')[i]).addClass("share_oruon");                $('#mociId').val(selectId);            }        }}

function downloadSvgFromWeb(){     var svgXml = $('#viewSvgbefore').html();    var image = new Image();    image.src = 'data:image/svg+xml;base64,' + window.btoa(unescape(encodeURIComponent(svgXml))); //给图片对象写入base64编码的svg流    var canvas = document.createElement('canvas');  //准备空画布    canvas.width = $('#viewSvgbefore svg').width();    canvas.height = $('#viewSvgbefore svg').height();    var context = canvas.getContext('2d');  //取得画布的2d绘图上下文    context.drawImage(image, 0, 0);    var a = document.createElement('a');    a.href = canvas.toDataURL('image/png');  //将画布内的信息导出为png图片数据    a.download = "MapByMathArtSys";  //设定下载名称    a.click(); //点击触发下载}

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