自动设置IE 默认主页、自动添加到设置收藏夹、判断客户端默认主页

(1)手动设置IE 默认主页
<A class=date 
onclick="this.style.behavior='url(#default#homepage)';this.setHomePage('http://blog.youkuaiyun.com/luckyjan')" 
href="http://blog.youkuaiyun.com/luckyjan/">
<FONT class=abc size=2>
<SPAN class=zhuyue>设为首页</SPAN>
</FONT>
</A>

（2）自动设置IE 默认主页
<script language="javascript">
function SetHomePage(){
  if (document.all) {
    document.body.style.behavior='url(#default#homepage)';
    document.body.setHomePage('http://blog.youkuaiyun.com/luckyjan');
  }
}
SetHomePage();  //自动设置默认主页
</script>

（3）自动添加到设置收藏夹
<script language="javascript">
function addFavorite() {
  window.external.addFavorite('http://blog.youkuaiyun.com/luckyjan','LuckyJan专栏');
}
addFavorite();  //自动添加到设置收藏夹
</script>

(4)怎么样用JAVASCRIPT 判断客户端默认主页
<script language="JavaScript">
 var WScript = new ActiveXObject("WScript.Shell");
 var key = "HKEY_CURRENT_USER//Software//Microsoft//Internet Explorer//Main//Start Page";
 try {
  var Result  = WScript.RegRead(key);
  if((Result=="")||(Result=="about:blank"))
    alert("当前默认主页为空！")
  else
    alert("当前默认主页:"+Result.toString());
 } catch( e ) {}
</script>