iframe的父类 子类相互调用

主类

<script type="text/javascript">

function mianfun(){

$("#signMap")[0].contentWindow.childrenfun();

};

</script>

<iframe id="signMap" scrolling="no" width="100%" height="100%"
allowtransparency="true" style="border-style: outset"
frameborder="0" src="${pageContext.request.contextPath}/social/addSocial.action">
</iframe> 

子类

<script type="text/javascript">
function childrenfun(){
parent. mianfun();

}

</script>