今天遇到了一个问题：

通过document.write() 输出一个iframe 标签的时候 提示错误

Failed to execute 'write' on 'Document': It isn't possible to write into a document from an asynchronously-loaded external script unless it is explicitly opened.

在chrom上面就提示”Failed to execute 'write' on 'Document': It isn't possible to write into a document from an asynchronously-loaded external script unless it is explicitly opened. “

解决方法

var iframeStr = document.createElement('iframe');

document.getElementsByTagName('body')[0].appendChild(iframeStr)；