废话不多说，上代码：

// 添加到收藏夹
function AddFavorite(sURL, sTitle) {
	try {
		if (typeof(sURL) == "undefined" || sURL.length == 0) {
			sURL = window.location;
		}
		if (typeof(sTitle) == "undefined" || sTitle.length == 0) {
			sTitle = document.title;
		}
		window.external.addFavorite(sURL, sTitle);
	} catch (e) {
		try {
			window.sidebar.addPanel(sTitle, sURL, "");
		} catch (e) {
			alert("您使用的浏览器不支持此功能，请按“Ctrl + D”键手工加入收藏!");
		}
	}
}
// 设为首页
function setHome(objid, urls) {
	var a = objid,
		b = urls,
		c = "unknown";
	try {
		if (typeof(b) == "undefined" || b.length == 0) {
			b = location.href;
		}
		a.style.behavior = "url(#default#homepage)";
		var d = a.isHomePage(b);
		d = (d = d || a.isHomePage(b + "/")) || a.isHomePage(b + "/#");
		d = "" + d;
		if (d != "true") {
			a.setHomePage(b);
		} else {
			alert("您已经设为首页了!");
		}
	} catch (e) {
		alert("您的浏览器不支持自动设置主页，请使用浏览器菜单手动设置!");
		return "unknown"
	}
};

/*
使用方法：
添加收藏：AddFavorite('','');
设为首页：setHome(this,'');
*/