js 刷新子页面

<iframe src="1.htm" name="ifrmname" id="ifrmid"></iframe>方案一:用iframe的name属性定位<input type="button" name="Button" value="Button"onclick="document.frames('ifrmname').location.reload()">  或<input type="button" name="Button" value="Button"onclick="document.all.ifrmname.document.location.reload()"> 方案二:用iframe的id属性定位<input type="button" name="Button" value="Button"onclick="ifrmid.window.location.reload()">  终极方案:当iframe的src为其它网站地址(跨域操作时)<input type="button" name="Button" value="Button"onclick="window.open(document.all.ifrmname.src,'ifrmname','')">