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>