javascript获取iframe文档内容(兼容IE和Firefox)

<script type="text/javascript">
function getIframeContent(){? //获取iframe中文档内容
??????? var doc;

??????? if (document.all){//IE
??????????????? doc = document.frames["MyIFrame"].document;
??????? }else{//Firefox???
??????????????? doc = document.getElementById("MyIFrame").contentDocument;
??????? }

??????? return doc.body.innerHTML;

}
</script>