echarts 同样的三张图形,数据不一样,放入选项卡,点击后只显示一张

Question

function $(id) {
    return typeof id === 'string' ? document.getElementById('id') : id;
}
window.onload = function() {
    var titles = tab_tit.getElementsByTagName("li");
    var divs = tab_con.getElementsByTagName("span");
    if(titles.length != divs.length) {
        return;
    }
    for(i = 0; i < titles.length; i++) {
        titles[i].id = i;
        titles[i].onclick = function() {
            for(j=0; j < titles.length; j++) {
                titles[j].className = '';
                divs[j].style.display = 'none';
            }
            this.className = 'select';
            divs[this.id].style.display = "block";
        }
    }
}