<script>
function SetHome(obj,vrl)
{
          try
          {
                  obj.style.behavior='url(#default#homepage)';obj.setHomePage(vrl);
          }
          catch(e)
          {
                  if(window.netscape)
                  {
                         try {
                                  netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
                              }
                         catch (e)
                              {
                                  alert("抱歉！您的浏览器不支持直接设为首页。请在浏览器地址栏输入“about:config”并回车然后将[signed.applets.codebase_principal_support]设置为“true”，点击“加入收藏”后忽略安全提示，即可设置成功。");
                              }
                         var prefs = Components.classes['@mozilla.org/pre】、ferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
                         prefs.setCharPref('browser.startup.homepage',vrl);
                  }
         }
}
</script>

<input id="btnSetHomePage" type="button" value="将本页设为主页" onclick="SetHome(this,window.location);return false;" />