在前端我已经获取了每个名字，但却无法将它显示出来
var innerdetail = unescape(xmlhttp.responseText),
txt = innerdetail.split(",");
for (i = 0; i < txt.length; i++) {
var opt = new Option();
opt.value = txt[i];
opt.text = txt[i];
var selobject = document.getElementById("keytishi");
selobject.innerHTML"<lu><li>"+txt[i]+"</li></lu><br/>"; }
要怎么修改呢