[osflash] hi list, A question about OOP

[=?gb2312?B?YXdmbGFzaGVy?=]

the two following scripts seems to be the same, but different choice get different performance .

1 var MCL = new MovieClipLoader();
2 var MCL:MovieClipLoader =  new MovieClipLoader(); 

when I use 1, I can just write my script like this:
MCL.onLoadStart = function (t) { ... }

But When I choose 2, the IDE tells me that the MCL object doesn't have the 'onLoadStart' method.

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Can any one here gives me some hint on this in details. Thanks in advance.    
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