Flash hides the correct solution to the div problem

I met a problem in the project that I had been confused for a long time, and it was finally solved today. The solution is simple.

Direct code:

 
<script type="text/javascript" src="swfobject.js"></script> 
<script type="text/javascript"> 
// For version detection, set to min. required Flash Player version, or 0 (or 0.0.0), for no version detection. 
var swfVersionStr = "11.1.0"; 
// To use express install, set to playerProductInstall.swf, otherwise the empty string. 
var xiSwfUrlStr = "playerProductInstall.swf"; 
var flashvars = {}; 
var params = {}; 
params.quality = "high"; 
params.bgcolor = "#ffffff"; 
params.allowscriptaccess = "sameDomain"; 
params.allowfullscreen = "true"; 
<strong><span style="font-size:24px;color:#ff0000;">params.wmode= "opaque";</span></strong> //To handle the problem of masking div,add by javaalpha at 2014-2-10 15:44:51