解决Fileupload 在IE 10 中需要双击的问题

方法来自于：https://code.google.com/p/primefaces/issues/detail?id=5355

the oncomplete event is working for me.  it seems that the only workaroud for the double click issue is by setting  

即在页面中加入

<meta http-equiv="x-ua-compatible" content="IE=9">