<!-- 展开与收缩 -->
var mh = 42;//最小高度
var step = 5;//每次变化的px量
var ms = 10;//每隔多久循环一次
function toggle(o){
if (!o.tid)o.tid = "_" + Math.random() * 100;
if (!window.toggler)window.toggler = {};
if (!window.toggler[o.tid]){
window.toggler[o.tid]={
obj:o,
maxHeight:o.offsetHeight,
minHeight:mh,
timer:null,
action:1
};
}
o.style.height = o.offsetHeight + "px";
if (window.toggler[o.tid].timer)clearTimeout(window.toggler[o.tid].timer);
window.toggler[o.tid].action *= -1;
window.toggler[o.tid].timer = setTimeout("anim('"+o.tid+"')",ms );
}
function anim(id){
var t = window.toggler[id];
var o = window.toggler[id].obj;
if (t.action < 0){
if (o.offsetHeight <= t.minHeight){
clearTimeout(t.timer);
return;
}
}
else{
if (o.offsetHeight >= t.maxHeight){
clearTimeout(t.timer);
return;
}
}
o.style.height = (parseInt(o.style.height, 10) + t.action * step) + "px";
window.toggler[id].timer = setTimeout("anim('"+id+"')",ms );
}
//让他默认为收缩状态的；
window.onload=function(){
toggle(document.getElementById("aaa"))
}