最想了解的技术:
<!--select 复选框 -->
<option value="设计模式">设计模式</option>
<option value="222222222">222222222</option>
<option value="333333333333">333333333333</option>
<option value="44444444444">44444444444</option>
</select>
var select = document.getElementById("jishu");
var options = select.options;
let lenee=document.getElementById("jishu").length;
for (let j=0;j<lenee;j++)
{
if (document.getElementById("jishu")[j].selected)
{
let ee = options[j].value;
document.getElementById("zuixiangliaojie").innerText="最想了解的技术:"+ee;
}
}