点击展开收缩

function hui(hhc,btn)
{
var oHua = document.getElementById(btn);
var oHhc = document.getElementById(hhc);
oHua.onclick = function ()
{
var style = oHhc.style;
if(style.height=="26px"){
style.height="auto"
oHua.innerHTML="点击收回"
}else{
style.height="26px"
oHua.innerHTML="展开更多"
}
oHua.className = style.height == "26px" ? "" : "open"
}
}
hui("outer" ,"title")