js判断display隐藏显示
// 判断是否为隐藏(css)样式
function isHide(obj) {
var ret = obj.style.display === "none" ||
obj.style.display === "" ||
(obj.currentStyle && obj.currentStyle === "none") ||
(window.getComputedStyle && window.getComputedStyle(obj, null).display === "none")
return ret;
}