シンプルなjsで簡単なアニメーションが必要です。そのためにはjqueryが多すぎると思います。ボタンを押してブロックの高さを増減する必要がありますが、これは Opera (.
function global_animate(element, property_to_map, duration, callback) {
duration = duration || 1000;
var delta = function (a) { return a; };
var start = new Date().getTime();
var property_from_map = {};
var property_units_map = {};
for (var property in property_to_map) {
property_from_map[property] = window.getComputedStyle(element, null)[property] || element.currentStyle[property];
property_units_map[property] = parseUnits(property_from_map[property]);
property_from_map[property] = parseInt(property_from_map[property]);
property_to_map[property] = parseInt(property_to_map[property]);
}
function parseUnits(a) {
try {
return a.match(/^\d+(\w{2}|%);?$/i)[1];
} catch (e) {
return "";
}
}
setTimeout(function() {
var now = (new Date().getTime()) - start;
var progress = now / duration;
for (var property in property_to_map) {
var result = (property_to_map[property] - property_from_map[property]) * delta(progress) + property_from_map[property];
element.style[property] = result.toFixed(2) + property_units_map[property];
}
if (progress < 1)
setTimeout(arguments.callee, 10);
else
if (typeof callback == 'function')
callback();
}, 10);
}