怎么样利用javascript检查客户端是否已经安装了某些程序?如迅雷!

Question

好像是有点异想天开.
算了.
结了吧!

Answer 1

 方法很简单:
var d;
        try {
            d = new ActiveXObject("ThunderServer.Agent.1");
        } catch (e) {
            try {
                d = new ActiveXObject("ThunderAgent.Agent");
            } catch (e) {
                try {
                    d = new ActiveXObject("ThunderAgent.webThunder.1");
                } catch (e) {
                    d = null;
                }
            }
        }
        if (d == null) {
            alert("没有安装迅雷1");
            return;